Help! Getting into the top universities with predicted A-level grades and scholarships

[Lury]

I wanted to study in Canada and my parents would give me about 30,000 CAD for it. I wanted to apply with predicted A2 grades which I am aiming to have as high as I can, and 6 A*s and 2 As in IGCSE.
I'm also going to work part-time.
Now, with say predicted grades of above AAA/AAA*, how much scholarship can I expect to get in the top universities? I don't really have any great extracurricular achievements to apply with for scholarships.
I wanted to apply in University of Alberta, University of Calgary and University of McMaster. If I want to have as much financial aid as possible, should I look into lower tier universities instead?
Also, if I apply with predicted grades, and the application deadline is January but document deadline is February (or March and August), won't I need to input any grades when I apply? Do I just need to input some information and pay the application fee? If I don't need to submit the predicted grade form when I am just applying, then should I apply for scholarships as soon as possible and then submit the predicted grades when I receive it?
Please answer all my questions and thanks in advance!