Answer
You need 200 hours total time, with 100 hours of PIC time, to get a commercial license in Canada. Multi engine rating can be done in 10-15 hours and can be included in the time for your commercial license. On average it costs $135 wet lease per hour and $165 with an instructor. ME time is $250 per hour (these are average prices, you can find schools cheaper than this). Just doing the math, you need 140 more hours (10 hours ME = $2500 approx, 15 hrs instructional for CPL = $2475, and 115 hours of time building = $15410.) Total approximate cost is $20385. Add in your exam fees and you are looking at close to $20500. As for schools in Ontario/Toronto area try looking here http://www.learning-to-fly.com/flight-school-directory-page2.html Hope this helps Cheers