So not everything requires that you buy a ticket. Toronto has some great free or nearly free shows. I have compiled a short list to help you find some terrific activities that won't hurt your pocket.
The Toronto Harbourfront Centre is a great place to be in the summer. They have some great eats and cool shows that are FREE. Yes, that is correct.
HarbourFront Centre - Free Events - Whats On
If you are close to High Park - than check out the CanStage for some Shakespeare in the Park. There is a nominal donation, but its a very reasonable.
Downsview Park is full of great fun and plenty of stuff to keep your weekend having fun. Not really about shows - more about great family fun in the sun.