If American Musical will ship to Canada, they have an amazing Pay as you Play plan. At American Musical, anything under $1000 is divided into 3 payments. They also ship the product right away, not like Layaway where you dont get the product until its paid off. If you buy anything over $1000 its divided into 4 payments. Check their website out.
You just need a Credit Card ( or your parents can do it for you) and the payments are taken out every month. Just make sure the Card has enough to cover the full purchase amount. This is the closest to Rent To Own but without the interest fees.