You want a list of the unlockable and purchaseable perks and killstreaks in Call of Duty: Black Ops? Here you go!

Perk 1
Lightweight - Move Faster (Pro)
Scavenger - Pick up ammo from fallen enemies. Replenish lethal grenades. (Pro)
Ghost - Undetectable by the Spy Plane and the Blackbird.
Flak Jacket - Reduces explosive damage.
Hardline - Killstreaks require 1 less kill.

Perk 2
Hardened - Bullets penetrate better.
Scout - Hold breath longer.
Steady Aim - Increased hip-fire accuracy.
Sleight of Hand - Faster reloads.
Warlord - Equip two attachments to your primary weapon.

Perk 3
Marathon - Longer sprint.
Ninja - Silent movement.
Second Chance - Pull out your pistol before dying.
Hacker - Ability to detect enemy equipment and explosives.
Tactical Mask - Reduces the effect of flash and concussion grenades.

Killstreaks

* 3 – Spy Plane
* 3 – RC-XD (remote bomb)
* 4 – Counter Spy Plane
* 4 – SAM Turret
* 5 – Care Package
* 5 – Napalm Strike
* 6 – Sentry Gun
* 6 – Mortar Team
* 7 – Attack Helicopter
* 7 – Valkyrie Rockets
* 8 – Blackbird
* 8 – Rolling Thunder
* 9 - Chopper Gunner
* 11 – Attack Dogs
* 11 - Gunship