instant 80

[sleuthloki]

how much do i have to donate to be instant 80? and how do i do it?

[skullatbash]

only for Icecrown there is instant 80 service, it cost 20 Coins
Donate :
https://www.warmane.com/account > "Donate" > donate 20 euro/dollar will get you 22 Coins

Once you have at leats 20 coins on your account you can spend them on market and service.
In your case you will go here:
https://www.warmane.com/account > "services"

[Justmarried]

As skullbashat said, plus i would like to add this. When you get fresh lvl 80, do you have gold for spells, training etc? as naked lvl 80 you might have hard time, i would say add few more extra and get at least somewhat geared character from Trade.