TOEFL Scores

A GRE score above 315 should be targeted and a TOEFL of 90 to 100. It is better you check some university websites for the admission requirements, you will be able to prepare in a better way if you have a target and goal in mind. Different universities have different criteria.

Scholarships are based on merit, they are given by the universities (you are applying to) to deserving students. Generally applicants are considered by default and the most meritorious ones are considered. Very good academic grades, a good GRE score, above 310, TOEFL score above 100, extracurricular activities, SOP, recommendation letters etc. Are evaluated.

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.