The IELTS score is a minimum admissions level. If there are many students better than you, the actual admittable average may be higher.
As for expenses:
How much is your rent to live? The 12,000 is just tuition.
Even at $12,600 you would need a job that pays $39.75 per hour after taxes.
If you get a job that will allow you to work full time over the three month break, that's an additional 480 hours. So then you're looking at needing a job that will pay you $16 per hour after taxes.
But $600 for living expenses over seven months is a little bit insane. Are you planning on having one piece of toast a day for food? And what about a place to live?
Dorm fees at UOttawa for the term are a minimum of about $10,000. Sometimes you are required to purchase a meal plan, that is about $6,000. That's only for the term, not the summer break where you're on your own.
So taking the tuition - $12,000 - adding dorm fees - $10,000 - and meal plan - $6,000 - your second term will cost a minimum of $28,000. We're not yet counting summer living expenses, textbooks, anciliary fees like athletics fees, student services, fees, etc.
Assuming the 800 working hours over summer and your second term, you need a job that will pay $35 per hour after taxes. And that's assuming you get one that will allow you to work 20 hours during the term and full time over the summer and that you get full time hours.