go on options
MW3 is after COD black ops.
You get to change your care package. For example if you get amo, you can change it to a spy plane
SAD.
if by levels you mean campaign you cant prestige but if your talking about your rank then its level 50 and there are 15 prestiges
no
I believe you have to unlock that with COD Points, and it should be in the customization tab
by getting head shots and kills
68
Its how you rank up in the game.
Cod black ops
Hacking or killing