what would be the best class for a warlock, ive started a Belf but if theres a race better i will play,

ps what spec is good for leveling

Depends a lot on preference.  Other than that you're racial passives. 

Blood Elves have a silence spell.

Undead have Will of the Forsaken (for breaking fear etc.) and Cannibalize.

Orcs have a +15% stun resistance and kill command which increases damage done by their pet by 5%. 

I have no clue really about alliance locks as I've never played one. :)

well on ally gnomes r the best for mage/warlocks since they get 5% intelligence and can escape from speed reduction AND they get +10 arcane resistence :)

Orc, Gnome, or maybe Undead.

The best leveling spec is Affliction. Insta-corruption is a must.
At 56+, Demo becomes pretty good too, similar to Affliction but much easier.

If you want to kill fast, you do this (as Affliction)

1 - Dot up
2 - Fear
3 - repeat for next mob.

Yes you will die more often, but it kills so fast that it's worth it.

what is ur favoret race for warloks. are u a warlock. enywase how do u get the lvl 20 pet for warloks I a trying so hard but i gust cant get it. can u help me pleas. thank u.

it is a quest that you have to do to get ur minions. I am demon. specced i love it at lvl 50 u get a felguard. It is worth it. Whatr do you like to do mostly?

Humans get Perception. If you ever PVP, nuff said