no
Private online matches...
Not in Private matches, but you can in normal, online matches
They give you a cheat for private matches but not online play
No. The only thing that is more then one player is private matches and zombies.
You must play multiplayer and play player matches, not wager/ private. You can also play combat training.
no
Getting experience points by winning matches, killing enemy players, completing contracts or challenges, etc.
no
In a shop.
you level up by getting experience points from killing other players, playing matches, and completing challenges in the barracks.
In Call of Duty: Black Ops, to get COD points in wager matches you have to come in the top 3.
no you can not record the games that you play on the PS3 harddrive