It depends on what control scheme you have set but if you have it set to default you shake the wii remote forwards or sideways
With the Y button (Xbox 360)
For Xbox 360 it's the X (blue) button.
R3 on PS3 and Xbox. On Wii I'm not sure I think Z on the Nunchuk
You press the grenade button
Xbox: B PS3: O Pc: Any button you set
You look at the person you want to revive, then you hold the the X button (Xbox, Xbox 360)
Call of duty 2
2 Call of Duty titles have been released for the original Xbox. They are Call of Duty: Finest Hour and Call of Duty 2: Big Red One.8 Call of Duty titles have been released for the Xbox 360. They are Call of Duty Classic, Call of Duty 2, Call of Duty 3, Call of Duty 4: Modern Warfare, Call of Duty: World at War, Call of Duty: Modern Warfare 2, Call of Duty: Black Ops and Call of Duty: Modern Warfare 3.(This information is as of 18 September 2012)
PS3: R1 Xbox 360: RT Wii: B DS: Fire Button
it depends where you get it
Yes I do have Call of duty 4 for the Xbox 360.
There is a Call of Duty for PS3 and Xbox 360.