pretty much all of them start at 1200, though I have heard some top GMs, like anand got started at 2800.
Starting rating
http://www.chess.com/members/view/TonySYim
http://www.chess.com/members/view/olomi007
http://www.chess.com/members/view/ChessQueen
Some are automatically 2000 some aren't
Normal players start with 1200 points. How many points do titled players get at start? Does it differ from a title? Should it differ, since CM and GM are very far apart?