Simple queries wrt launching new website

[imcoool]

hi respected members,

i purchased a domain and i want to make it multipurpose website , i want to include following featues in my website:-

1. social networking{like orkut}
2. online chat {java based}
3. forum {vbulletin or any other}facility
4. some entertainment stuff like wallpapers etc
5. possibly a tracker also after sometime..

PLEASE tell me :--

@ which hosting plan should i take as per my above requirements
@ from where should i purchase a hosting plan
@ which is best hosting service provider
@ can't we purchase domain for lifetime ? why there is renewal in year??
@ What basic things i need to have above features in my website?

thanks