You should read the FAQ
that'll answer any airsoft questions you have. As I just learned though, if you have any airsoft guns, I advise you sell them before you move, luckily for me I actually won't have to sell my gun when I move back to Canada from the UK, as I started a club here, and it'll just be permanently added to the club stock. Also, if you have any problems reading English, I advise you use google translator: http://translate.google.com/#
But other than that I hope you enjoy living in Canada, and enjoy playing airsoft in Canada, as yes, it is legal there, but there are afew legal bits that you should look up first.