Garrosh Hellscream, the last boss in 5.4 Siege of Orgrimmar. level unknown but obviously level 90 or higher.
The highest level you can go is level 20.
70
With the trial , the highest level you will be able to get is 20, and i believe the max gold you can get is 4.
2456 is the highest level reach so far but there are highest levels for all the maps
dependidng o what you like
Yes, a level 52 is able to get into Sunken Temple in World of Warcraft.
Go to your acheivements, then go to the statistics tab from that window, you can find your liftime highest critical hit there. You can do this in-game or from the World of Warcraft Armory.
Holy priests
World of warcraft, by a LARGE amount
Currently in Mists of Pandaria, the latest expansion to World of Warcraft, there are 90 levels.
One can purchase max level World of Warcraft accounts from a site that offers the services of selling World of Warcraft accounts. One example includes "BuyMMOAccounts".
A level 60 raid.