If you know where you need to go then you should just ask people who have been. I lived in Toronto for a year about 3 or 4 years ago. It was fairly average in terms of cost of living. It is relative to what you earn I suppose so if you earn a good wage you can live very well. Compared to Dublin you're smiling. Rent is cheaper (although most places are unfurnished), food and drink are cheaper and transport is fairly reasonable. Canada is a great county to live in, except the winter is bitterly cold (I think it hit -33 degrees at one point while I was there).