I'm Canadian and living London so prob have a reasonable idea of what you can expect. Email me any specific questions.
Uk and Canada have a tax treaty so you only have to pay the difference. Lowest CAD tax bracket is around 20K and is maybe 20%. If you make over 60k a year you're probably paying around 40+% per year. That includes EI (employment insurance) and CPP (Canada pension plan). If you're making more, you'll pay a lot more.
Eating out in Canada is cheaper than here, but eating in is cheaper here (meat, dairy industry are even more heavily subsidized here). In general, prices are about the same for many things as here, except in CAD dollars, and the salaries are about 1.5 to 2 times as much as the same salary here. But! You pay 15% tip for almost everything service related, and the tax (~14%) is added once you get to the till to pay, added to the price tag.
Again, any more specific questions, email me.