Feel free to ask lots of questions! We're all here to help.
Chickens usually tolerate cold very well. Some helpful tips include: feeding them corn/scratch grains before cold nights, making sure there is plenty of ventilation (without drafts) in the coop, having a good layer of bedding in the coop, and applying Vaseline/oil to their exposed areas before nightfall.
You may want to post on the "Canadians - check in here," thread for info on where to get feed at best prices, who has what breeds for sale, information on dealing with predators in the area etc.
Welcome to BYC. Glad you decided to join our flock. Please feel free to ask any questions you may have. We are here to help in any way we can. What kind of chooks do you have?