I personally believe they can. their first game is against the Redskins at home and if the seahawks can have a good game there's no way they'll lose with the 12th man. After that its a little more iffy but if the seahawks can just start peaking I can't see a reason why there isn't a chance of them making it to the superbowl.
Without T.O. the cowboys aren't that good. I'm thinkig the Giants win in a close game if T.O. doesn't play. Now if he does play with that ankle I don't think he'll be able to play at full strength so I don't know about that game. It is gonna be a good one though