If you alredy have PS3 online account, just go to multiplayer, then press online.
You can play online in Call of Duty Black Ops PS3 using the online split-screen support.
No
No. but you can play call of duty blacks online on a PC
If there isn't a download on the store with call of duty, then no. You can play call of duty 3 onwards on the PS3.
You need the game in the PS3 to play it online, then it is an option available if you are also able to go online
No. 100% sure.
yes
This is your username which people will see when you play online in games such as call of duty.
yes if you got a PS3
Yes, Call of Duty 5 for the PS3 supports online chat, like most online games do.
no
You can only play online for free with a PS3 or xbox360 or a wii. So make an account go to your call of duty game and go to multiplayer go to online connect and there you go your on online mode