Toronto is a big city. That's not a very easy question to answer. There are many opportunities there. I doubt you are going to be a corporate lawyer which is a top job paying in the $100,000 plus range per year.
So, realistically, union jobs in construction are top jobs. There is a big demand for trained skilled workers such as legal secretaries, nurses, etc.
Asking for the top ten is not a good question because those jobs aren't open to most. Are you a computer scientist? Didn't think so but that's a top job. Engineers are in big demand. Not one of those either, eh? Are you getting the idea?