Canada Visa

Yes. Thompson River University will be good for you.

Yes you can as per the admission criteria your CGPA is bit less but you cracked GRE, so no problem, go ahead and apply for admission. Try for the University of Windsor, University of Saskatchewan, University of Waterloo and Memorial University of Newfoundland..

Up to 8 backs are allowed in Canada, so 5 will work. Clear your backs, if you have not cleared it yet. You have a decent score in class 10th, 12th, graduation and IELTS also. Just clear your backlogs, you will get the admission in college and visa too.

For top universities, you cannot apply. You can get admission in private colleges but you need to clear IELTS with 6.5 band in all sections and not less than 6.
I hope it helps.

It is either a Diploma or a graduate certificate. Entry requirement for Diploma courses in Canada is 6 bands with not less than 5.5 in any module and class 12th passed.
Entry requirement for graduate certificate in Canada is 6.5 bands with not less than 6 in any module and a 3 years Bachelor degree.

You can choose many subjects as per your interests,but you should first mention your stream in graduation to help you further in the same.

With 51%, it's going to be so tough. I would suggest you to look into Australian colleges. Universities in Canada are very competitive. Of course, you can apply for a visa but chances are minimal.

NWAC is recognized by MHRD and AIU both. So, there should not be any issue. Just to ensure the equivalence with Canadian universities. You may write to them directly with your transcripts.

Your marks should be more than 60% in class 12th and IELTS band 6.0 to 6.5. Marks should not be less than 50% in any subject.

I am sorry to say this, it will surely effect your visa process and to be honest there are only 10% chances of visa approval.