You don't want to start out with a canadian tire gun.
You will be HORRIBLY out-ranged by everyone on the field and it will prove to be a VERY poor experience for you.
Save up 200-300 bucks and get a clearsoft G&G line.
Verification depends where you live, You have to meet up with a verifier and show them government issued ID to prove you're 18+
If you're in Manitoba, we can meet up and I can verify your age
I'm a seller of BB-bastards for Manitoba, There's pretty much a seller in every province. However, I don't think your Canadian Tire gun will have the velocity to use heavier than .20 gram BB's