Can you get the ak-47 in nazi zombies in black ops?

yes it will.

Yes, unfortanitly, there is only one, and that's Kino Der Toten

Accually, their is 3. Kino Der Toten, Five , And dead ops arcade. Five can be unlocked by either beating the game or going to the computer and putting in the code: 3ARC UNLOCK just like that.

Actually, there are 9. Kino Der Toten is the one you start with, Five can be unlocked by beating the game or going to computer & putting the code: 3ARC UNLOCK, Dead Ops Arcade can be unlocked by putting in the code: 3ARC UNLOCK or DOA, If you buy First Strike then you get Ascension, If you buy Escalation then you get Call Of The Dead, and if you buy Call of Duty Black Ops Hardened or Prestige Edition you get all the old WaW Nazi Zombies Maps including: Nacht Der Untoten, Verruckt, Shi No Numa, and Der Riese.