I was just checking out Wikipedia's list of bands from Canada. They even break it down by province and city, which means I can tell you the following bands are from Toronto.
- Andrew Cash
- Armed and Hammered
- Barenaked Ladies
- The Battered Wives
- The Birthday Massacre
- The Black Maria
- Blue Peter
- Broken Social Scene
- By Divine Right
- Cancer Bats
- controller.controller
- Cowboy Junkies
- The Deadly Snakes
- Death from Above 1979
- Do Make Say Think
- Exovedate
- Femme Fatale
- Fifth Column
- Final Fantasy
- The Government
- I Mother Earth
- I am Robot and Proud
- The Lowest of the Low
- Magneta Lane
- Metric
- MSTRKRFT
- Nash the Slash
- Our Lady Peace
- Pilate
- Rheostatics
- Rush
- Stars
- Thornley
There are some awesome bands there, and if we look beyond the 416 at the rest of Ontario, there's...
- 13 Engines
- Alexisonfire
- Bedouin Soundclash
- Billy Talent
- City and Colour
- Finger Eleven
- Five Man Electrical Band
- High Holy Days
- Jersey
- k-os
- Avril Lavigne
- Alanis Morissette
- Sum 41
- Teenage Head
- The Headstones
- The Gandharvas
- The Tea Party
- The Tragically Hip
- Three Days Grace
- Shania Twain
That's not bad, eh?