It's not possible to give odds at this time, but the idea has been brought up before. I really hope the chess.com staff will implement this in the future.
giving an opponent odds

You could move the pieces around to achieve any starting position (a Takeback game would be a particularly handy way of doing it). Such a game would naturally be unrated.
You may be interested in this list of balancing mechanisms - and another set for fairer team matches.
On this site, is their a way to challenge someone to a game in which you start down a piece? I know you can choose any of the opening positions in chess.com's opening book to start from, but is there a way to simply start down a piece? If not I think this should be an option.