yes and no it depends on which system u are playing on
You have to be a level 26.
Yes, you can level up online for competitive online only. You do not get experience from Zombies.
You unlock it at level 26, and then you have to buy it for 2,000 COD points.
Black-ops will have an offline version of the multiplayer, with AI opposition. Also you will be able to level up as if you were online =)
You can but it doesn't count for online multiplayer.
In Black Ops, you don't get an offline multiplayer account. It only shows your playercard from your online account. So the answer to your question is; you can't level up on your Black Ops splitscreen account because you don't get splitscreen accounts in Black Ops.
There are 15 prestiges, the maximum level in each prestige is 50.
You HAVE to LEVEL up and BUY them with COD points.
Technically you cant beat zombies but online you can only go to round 42
In Black Ops multiplayer you unlock the AK-47 at level 38.
Yes you can play online in black ops with psn and xbox live
Xbox isn't free online, but ps3 is. There's no exception with Call of Duty Black Ops.