Canada

As you would have a grip over mechanical topics, doing ME as a post bachelors programme leading to the professional degree which gives you a terminal Master's degree. If you are interested in updating technical skills, this would be a great option for sure.
Colleges in Coimbatore for ME:
Bannari Amman Institute of Technology
Velalar College Of Engineering And Technology

Yes, but if you clear all the backlogs.

A first class is required, at least 60% by some of them while the top ones require 75%.

Hi,
The best course is specific to an individual. You have to know what is best for you, what your career plans are and decide accordingly. You can opt for mechanical engineering, manufacturing engineering, automobile engineering, design, robotics, etc.

Hi,
Please check here for step by step process:
http://www.mta.ca/apply/

Please confirm your full educational profile for advice.

Hi,
Check UBC, University of Toronto, York University, McGill University, Simon Fraser, etc.

Hi Lakshmii,
Not every university in Canada requires a GRE score. You have to check the university websites for entry requirements accordingly.

Hi,
Have you been granted a loan already? For Diploma courses banks generally, don't give loans.

Hi,
It's is not possible to name a college like this. Sometimes a university or college can accept lower scores and also offer bridge courses in English or pathway courses. This will depend the university completely. You need to email some universities and find out. Your class 12th grades are good so you will find good options.