this is my modified upload.processor.php
Code:
<?php
include("files/dblines.php");

/*===================================text insert====================*/
if(($_POST['platenumber']=="")
  && ($_POST['carmake']=="")
  && ($_POST['carmodel']=="")
  && ($_POST['classcar']=="")
  && ($_POST['caryear']=="")
  && ($_POST['enginetype']=="")
  && ($_POST['maxpower']=="")
  && ($_POST['fueltype']=="")
  && ($_FILES['picture']=="")
  && ($_POST['price']==""))
{
  printf("<h2 class=\"messages\">ERROR: Please enter all the required information for new vehicle.</h2>");
}
else
{  
  $singleinput = 1;
  $columnnames = "";
  $columnvalues = "";
  
  if(isset($_REQUEST['platenumber']))
  {
    $platenumber = stripslashes(trim($_REQUEST['platenumber']));
    
    if($singleinput)
    {
      $columnnames .= "`platenumber`";
      $columnvalues .= "'{$platenumber}'";
      $singleinput = 0;
    }
    else
    {
      $columnnames .= ",`platenumber`";
      $columnvalues .= ",'{$platenumber}'";
      $singleinput = 0;
    }
  }
  if(isset($_REQUEST['carmake']))
  {
    $carmake = stripslashes(trim($_REQUEST['carmake']));
    
    if($singleinput)
    {
      $columnnames .= "`make`";
      $columnvalues .= "'{$carmake}'";
      $singleinput = 0;
    }
    else
    {
      $columnnames .= ",`make`";
      $columnvalues .= ",'{$carmake}'";
      $singleinput = 0;
    }
  }
  if(isset($_REQUEST['carmodel']))
  {
    $carmodel = stripslashes(trim($_REQUEST['carmodel']));
    
    if($singleinput)
    {
      $columnnames .= "`model`";
      $columnvalues .= "'{$carmodel}'";
      $singleinput = 0;
    }
    else
    {
      $columnnames .= ",`model`";
      $columnvalues .= ",'{$carmodel}'";
      $singleinput = 0;
    }
  }
  if(isset($_REQUEST['classcar']))
  {
    $classcar = stripslashes(trim($_REQUEST['classcar']));
    
    if($singleinput)
    {
      $columnnames .= "`carclass`";
      $columnvalues .= "'{$classcar}'";
      $singleinput = 0;
    }
    else
    {
      $columnnames .= ",`carclass`";
      $columnvalues .= ",'{$classcar}'";
      $singleinput = 0;
    }
  }
  if(isset($_REQUEST['caryear']))
  {
    $caryear = stripslashes(trim($_REQUEST['caryear']));
    
    if($singleinput)
    {
      $columnnames .= "`caryear`";
      $columnvalues .= "'{$caryear}'";
      $singleinput = 0;
    }
    else
    {
      $columnnames .= ",`caryear`";
      $columnvalues .= ",'{$caryear}'";
      $singleinput = 0;
    }
  }
  if(isset($_REQUEST['enginetype']))
  {
    $enginetype = stripslashes(trim($_REQUEST['enginetype']));
    
    if($singleinput)
    {
      $columnnames .= "`enginetype`";
      $columnvalues .= "'{$enginetype}'";
      $singleinput = 0;
    }
    else
    {
      $columnnames .= ",`enginetype`";
      $columnvalues .= ",'{$enginetype}'";
      $singleinput = 0;
    }
  }
  if(isset($_REQUEST['maxpower']))
  {
    $maxpower = stripslashes(trim($_REQUEST['maxpower']));
    
    if($singleinput)
    {
      $columnnames .= "`maxpower`"; 
      $columnvalues .= "'{$maxpower}'";
      $singleinput = 0;
    }
    else
    {
      $columnnames .= ",`maxpower`"; 
      $columnvalues .= ",'{$maxpower}'";
      $singleinput = 0;
    }
  }
  if(isset($_REQUEST['fueltype']))
  {
    $fueltype = stripslashes(trim($_REQUEST['fueltype']));
    
    if($singleinput)
    {
      $columnnames .= "`fueltype`"; 
      $columnvalues .= "'{$fueltype}'";
      $singleinput = 0;
    }
    else
    {
      $columnnames .= ",`fueltype`"; 
      $columnvalues .= ",'{$fueltype}'";
      $singleinput = 0;
    }
  }
  if(isset($_REQUEST['price']))
  {
    $price = stripslashes(trim($_REQUEST['price']));
    
    if($singleinput)
    {
      $columnnames .= "`price`";
      $columnvalues .= "'{$price}'";
      $singleinput = 0;
    }
    else
    {
      $columnnames .= ",`price`";
      $columnvalues .= ",'{$price}'";
      $singleinput = 0;
    }
  }
  //$sql_insertion_data = "INSERT INTO `cars` ($columnnames) VALUES($columnvalues)";
  //mysql_query($sql_insertion_data) or die(mysql_error());
}
/*===================================image upload===================*/
// filename: upload.processor.php

// first let's set some variables

// make a note of the current working directory, relative to root.
$directory_self = str_replace(basename($_SERVER['PHP_SELF']), '', $_SERVER['PHP_SELF']);

// make a note of the directory that will recieve the uploaded file
$uploadsDirectory = $_SERVER['DOCUMENT_ROOT'] . $directory_self . 'images/';

// make a note of the location of the upload form in case we need it
$uploadForm = 'http://' . $_SERVER['HTTP_HOST'] . $directory_self . 'admin.php';

// make a note of the location of the success page
$uploadSuccess = 'http://' . $_SERVER['HTTP_HOST'] . $directory_self . 'upload.success.php';

// fieldname used within the file <input> of the HTML form
$fieldname = 'picture';

// Now let's deal with the upload

// possible PHP upload errors
$errors = array(1 => 'php.ini max file size exceeded',
                2 => 'html form max file size exceeded',
                3 => 'file upload was only partial',
                4 => 'no file was attached');

// check the upload form was actually submitted else print the form
isset($_POST['submit'])
    or error('the upload form is needed', $uploadForm);

// check for PHP's built-in uploading errors
($_FILES[$fieldname]['error'] == 0)
    or error($errors[$_FILES[$fieldname]['error']], $uploadForm);
    
// check that the file we are working on really was the subject of an HTTP upload
@is_uploaded_file($_FILES[$fieldname]['tmp_name'])
    or error('not an HTTP upload', $uploadForm);
    
// validation... since this is an image upload script we should run a check  
// to make sure the uploaded file is in fact an image. Here is a simple check:
// getimagesize() returns false if the file tested is not an image.
@getimagesize($_FILES[$fieldname]['tmp_name'])
    or error('only image uploads are allowed', $uploadForm);
    
// make a unique filename for the uploaded file and check it is not already
// taken... if it is already taken keep trying until we find a vacant one
// sample filename: 1140732936-filename.jpg
$now = time();
while(file_exists($uploadFilename = $uploadsDirectory.$now.'-'.$_FILES[$fieldname]['name']))
{
    $now++;
}
//name var for image
$imagename = $now.'-'.$_FILES[$fieldname]['name']; 

// now let's move the file to its final location and allocate the new filename to it
@move_uploaded_file($_FILES[$fieldname]['tmp_name'], $uploadFilename)
    or error('receiving directory insuffiecient permission', $uploadForm);

//in addition to Bokeh's script you can insert each record into a database.
if(($columnnames == "")&&($columnvalues == ""))
{//insert image only
  $q = "INSERT INTO `cars` (`picture`) VALUES ('$uploadFilename')";
  $s = mysql_query($q);
}
// insert other info and image
else
{
  $columnnames .= ",`picture`";
  $columnvalues .= "'{$uploadfilename}'";
  $q = "INSERT INTO `cars` ($columnnames) VALUES ($columnvalues)";
  $s = mysql_query($q);
}
//if an error
echo(mysql_error()); 

// If you got this far, everything has worked and the file has been successfully saved.
// We are now going to redirect the client to a success page.
header('Location: ' . $uploadSuccess);

// The following function is an error handler which is used
// to output an HTML error page if the file upload fails
function error($error, $location, $seconds = 5)
{
    header("Refresh: $seconds; URL=\"$location\"");
    echo '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"'."\n".
    '"http://www.w3.org/TR/html4/strict.dtd">'."\n\n".
    '<html lang="en">'."\n".
    '    <head>'."\n".
    '        <meta http-equiv="content-type" content="text/html; charset=iso-8859-1">'."\n\n".
    '        <link rel="stylesheet" type="text/css" href="stylesheet.css">'."\n\n".
    '    <title>Upload error</title>'."\n\n".
    '    </head>'."\n\n".
    '    <body>'."\n\n".
    '    <div id="Upload">'."\n\n".
    '        <h1>Upload failure</h1>'."\n\n".
    '        <p>An error has occured: '."\n\n".
    '        <span class="red">' . $error . '...</span>'."\n\n".
    '         The upload form is reloading</p>'."\n\n".
    '     </div>'."\n\n".
    '</html>';
    exit;
} // end error handler

?>
and this is the error i'm getting

Column count doesn't match value count at row 1
Warning: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\dandd\upload.processor.php:256) in C:\xampp\htdocs\dandd\upload.processor.php on line 260
what's gone wrong?