Looks like your missing some extensions, do you have a info.php file? should be with phpMyAdmin I think.
If not just create this simple file and navigate to it.
save is as something like info.php
Open it up and look for the MySQl extension listed, if it's not listed you need to look in the php.ini file for something like:
to un-comment this remove the ;
Looks like you also need the extension mcrypt.
After you make each change you need to restart apache as well.
Also double check to see if MySQL server is running
This might have some other info to point you in the right direction, Link