Here's a map I made for another SSP tourist:
Toronto - tourism by
SSP Tony, on Flickr
Vegan Pizza can be had at
Magic Oven and
Pizzaiolo... not so sure about Pizza Pizza (which honestly kinda sucks).
There are a ton of good breakfast places, so many Greek-owned greasy-spoons. But if you want a local chain, give
Fran's a try.
I'm assuming you'll be staying somewhere near downtown?