M.S in Canada

You can check the individual requirements such as GRE TOEFL etc. On the links itself. https://studyabroad.shiksha.com/ms-in-abroad-dc11509
Narrow down your choice based on your budget, university admission requirements, your profile, location and climate preference etc. In terms of post study work options Australia and Canada are better.

Best universities in CanadaGeorge Brown College. Seneca College. Red River College. McGill University. University of Waterloo. University of Alberta. University of British Columbia. University of Toronto. Good luck.

University of Alberta
McGill University of Waterloo
University of Calgary.

To do Masters in Canada, IELTS is must but some colleges can accept TOEFL too. In Australia, IELTS is mostly accepted in colleges. So, I personally suggest you give IELTS exam. Also, GRE is not mandatory, but it will enhance your application and you might stand out from other students, so there's more chance to get the admission.

You can get the student guide to study in Canada in the given link:
https://studyabroad.shiksha.com/student-guide-to-canada-guidepage-14

There are high chances that you might get selected. With your GRE score, apply in any top institutes.

Of course, you do. It depends on the stream you are interested in.

It depends on which universities you are applying for. So check their official website.

Yes, you can easily get great universities in Canada, like University of Toronto, McGill University, University of Calgary, University of Ottawa and many more with IELTS requirement of 7 or less (6.5 in each section) and 6.5 (6 in each section). Good luck and apply soon since deadlines have started to close.