IELTS

For Masters from Canada, you need to score 6.5 overall with not less than 6 in each module.
I don't know about the scholarship one.

These are the list of universities and colleges which do not require GRE:
Farleigh Dickinson University(NJ)
Monmouth University(NJ)
Montclair State University(NJ)
The Richard Stockton College of NJ(NJ)
Rowan University(NJ)
Wichita State University
Kansas State University
Virginia State University
Rivier Univ

You must at least bring 6.5 and 6 in each section for good chances. But, you should try to get 7 or above in overall.

You chances are high.

It's okay. My friend got in universities with GRE score of 284. So, there's no problem. But, as you are working, you should write again to get scholarships if your academics are good.

Check with the universities first and let them evaluate your profile before deciding not to take the IELTS.
There is no minimum percentage requirement. The highly ranked universities would prefer an upper first class. Normally, 60 percent is good enough to be considered for admission in different un

You cannot get admission in any country to pursue MBA without the IELTS score.

Yes, you can, but if you want to study in good German Universities, you have to score 6.5 or higher in IELTS.

Yes, as most of the universities need to know your competencies in English and it becomes easier for visa interview.