Why do you have to undergo a foundation year? If it is possible for you to cover the condition back home and then directly start your full time studies in Canada, that's a better option. Plus, legally as far as I know you can only work part time; 20 hours per week. That is also if you are enrolled in a full time program. You can take Summers off and work. But important thing to note is that legally you can only work 20 hours per week. So I guess until you are really sure of your funds, don't travel and ruin your future and education. Because what you earn might not be enough to support your fees and living. Plus you will not be able to perform well in your studies if you work excessively.
Hope this helps!