Expect the pay to be half or less, but you get better overall benefits, a higher standard of living, in exchange for long winters and a mostly car-based society.
How walkable cities are are going to vary by city. Vancouver is very walkable. Also if you live somewhere up north, its not going to be that walkable even with a great bus system, because waiting for the bus in -30 sucks.
Eh, it's a dry cold. I've a good friend working in Nunavut right now and she walks to work. The trick is that her rental is nestled in the center of town; and the town is so small that there's no need for a car.
Honest, if you're willing to live and work in Calgary or Toronto then I don't see why you shouldn't move south and get paid more to live in similar cities.
I haven't commuted by car in ... 17 years.
I work in the Metro Vancouver area.