you are going to have to buy the perk,all you have to do is find the perk that you want and then whatever the price is save up for it and just buy it. the revive is 500 points and the other perks are around 3000.
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You obtain different perks through stashing collections. Considering there aren't as many perks as collections, I assume it is a random gift.
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Some of the Perks can be found under the related links although you do have to scroll down to the section
When you die in Zombies, you do not keep your perks.
PHD Flopper and Stamin-up
it depend sif your playing black ops zombies or world at war zombies black op zombies has stamin up double tap and PhD flopper regular world at war zombies has speed cola jugger nog and quick revive
Quick revive, juggernog or juggernaut, Speed Cola, and Double tap.
The perks are the same, but the weapons change. The only weapons in Black Ops that are also world at war weapons are the M1911, MP40, and the Ray Gun.
juggernog, speed cola, quick revive, mule kick, double tap rootbeer, stamin up, phd flopper, deadshot,
You cant obtain any perks from a level-up after you reach 30th level. However, you can still get other perks from quests.
No they have different perks for Black Ops II. None of the original maps will work in the new game and they are not making any of the 11 Black Ops Zombie Maps into versions for Black Ops II