Answer
You don't, why would you want to anyways. It's just guy characters.
No.
be more specific please
Go to edit game options
no
Go into multiplayer select xbox live and then scroll to combat training.
Disables enemies radars within the range of the transmitter.
Find a match?
Kill 5 enemies without dying
There is. Just go to settings and make the "Number of enemies" higher.
I am pretty sure you can... At least you can in Black Ops 2, In Black Ops 1 you should be able to go to "Game Settings" Or something of the sort and change the amount of enemies and friends.
U can turn invisible from enemies and unlimited healthp
Yes.