Kei Truck Questions

My car is on its last legs, and I've been thinking that a Kei Truck is what I'd like next. I just had a couple N.B.-specific questions about them, so here we go:

Are they difficult to obtain here?

Could they handle our winters?

How are they on gas?

If anyone has any answers, or other info they feel would be important, please let me know! I appreciate any and all wisdom.