if memory serves correctly you will have to respec straigt away as MOW has said.
Your level will be depentent on the skills you had pre NGE, your master Doc will get you so far, and you shouldn't lost the skills for that, if you had 2 pross mastered you should come out about lvl 80, leaving you just 10 lvls to grind up. althou if you were a hodge-podge of other proff and not actually mastered a second i have no idea where woul will come out and i really wouldn;t want to guess!!!!