Toronto has a first class subway system that you may access from Union Station.There is also a great transportation system of busses,streetcars,etc.You want to visit the C.N.Tower,Toronto Museum,Art Gallery,and if you are a sports fan depending on when you go Blue Jays baseball,Raptors baketball.Maple Leaf hockey,etc.Toronto is renowned for places to eat since it has the most diverse population from almost every country in the world.Anything from McDonalds to fine dining easily accessible from the downtown core.You also want to take in the Bloor yonge area for shopping(Yorkdale,etc).Whatever you want to do you can do it in Toronto.A city of over three million people.