He didn't seem to have one with Pertwee (Three), but it's too late for that now. (The yellow car is, BTW the Third Doctor's, yes.) As for the new Doctors, Eccleston doesn't do cons at all. He's kind of divorced himself from the Doctor. Tennant would be under the BBC contract not to appear at cons so long as he has the role, though I imagine he might start doing them once he hangs up the coat, so to speak. Of course, that doesn't mean the guy couldn't go to England and catch him in Hamlet, or Eccleston in some production. A lot of his photos were post-plays or book signings, etc.

Night!