For the shotguns, Remington 870 or Mossberg 500. Big plus one on either of them. Or both.
As for a rifle, it depends on what you want to do with it. For HD, it's probably not the most practical tool but again, depends on your circumstances.
For HD, just stick with the shotguns.
If you want to learn to shoot a rifle, just get a rifle in .22LR. A 10/22 is THE rifle. Cheap to shoot, and very very little recoil so you can shoot all day.
For hunting, a bolt action .30 caliber rifle is ideal. That includes, of course, 7mm magnum, etc. Many such rifles can be used for long-range shooting, even up to 1,000 yards.
A classic rifle you'll see a lot is the AR15 but that may be troublesome to get in Canada. Same with rifles like AK variants or SKS. Any of these rifles can be used for short range hunting or for home defense but they are high velocity rounds which can over-penetrate. If you live in an apartment or in a house with neighbors very close to you, it can be a problem.
I'm on www.thefiringline.com
which has a TON of information that will help you with all of these issues.
Let us know what you come up with.