Welcome! CN Tower, even though I think it's pretty boring up there. It has it's features like the glass floor, the 360 restaurant and now CN Edgewalk, if you're daring and not fear heights.
Casa Loma - It's a huge castle downtown Toronto.
Harbourfront has pretty entertaining festivals in the summer time. Check it out.
Centre Island
As for food places, I can only recommend Middle Eastern food places, if you like that cuisine.
At the airport about to head home now, thanks for all the suggestions I did a lot!
Things I did: CN Tower, Ripleys Aquarium, Double Decker bus tour, ferry ride, got to see all the sights.
I learned that they film the tv show Suits here in Toronto, they just make it look like its in New York.
Took the subway a couple times.
Very nice city. You guys really come out of the woodwork for Canada day, I was downtown and everyone was going to the Blue Jays game, the city was packed!