u get ur death knight at level 55...
but u need to do ALL THE QUESTS in the starting area to get gear that will last u untill level 66,(really great blues)
and u need to get ur talents
IE: 1 quest gives u 5 talent points and a crazy trinket
it took me 3 hours to get to 57... so ... yea
it was really fun, especially riding that dragon and breathing fire