Health Canada bans the sale and importing of nicotine
juice in Canada. So, consider buying your hardware separately from your e-
juice.
If you need something that looks like a cigarette, consider a KR808D-1. Because the batteries are relatively small, you may find you have to charge them several times a day. But, the 808s are a good compromise between small size and reasonable battery life. In Canada, Happy Vaper sells Bloog kits. Smokeless Image has good prices on an equivalent kit, but I haven't tried ordering from them from Canada, yet. Consider getting at least 1 manual battery with your kit. You have to push a button to vape, which makes it a little less like smoking, but there are fewer ways to make a manual battery die. You also get a slightly easier draw with the manual battery, if that appeals to you. Getting an extra battery with your kit for just in case is a good idea.
If you're ok with getting something bigger, consider something like a Riva 510 or eGo. Both models are about the size of a Sharpie. The battery life is much, much better than the smaller-sized models. And you can try low-resistance atomizers and cartomizers for more flavor. SmokeTech Dual Coil or Boge LR cartomizers are nice. In Canada, you can get an eGo from NicFitNation. You could also try Liberty-Flights.co.uk.
Liberty-Flights.co.uk also carries the E-Power 18650. It has the best battery life. It's also the largest, i.e. about the size of a large cigar.
Consider buying one extra battery with your kit for backup.
Regarding e-
juice. You want to get in 5 good posts, wait for moderator approval, then head over to the Canada forum for options for nicotine juice.