To be honest with you, there isn't a whole lot to do in Toronto. Probably the most exciting thing would be to walk up and down Younge St a few times, but then that gets boring too. I don't think I would recommend going to Toronto to anyone. It was nice twenty years ago but not any more. Plus all the Canadians are really arrogant and condescending toward Americans. I really don't know why any American would consider supporting the Canadian economy when their government actively works against our efforts in the war on terror and their politicians continue to insult us.
Plus their Broadway shows are really second rate with recorded music and cast members from such great schools of fine art as the University of Guelph and Southern Ontario.
I'd cancel the trip if it's not too late. Book a trip to NYC instead. If you're really coming, then spend some time in Buffalo!
