B.Tech

You are advised to specialize in automotive design after B.Tech mechanical engineering by enrolling for PG degree such as M.Tech in India or MS abroad / PG Diploma in automotive design / Online courses on automotive design.

GATE is examination for M.Tech studies in India. Most of universities abroad use GRE score for admission in their MS program. You may plan to appear in both GATE & GRE for wider choices for doing postgraduate degree in Mechanical engineering after B.Tech.

Can you mention the name of the university for better assistance?
If the university has good infrastructure, faculty, etc. it is fine to go with it and also exact reviews won't be possible, if the university has just started.

MDU has more value in every aspect, i.e. placements, faculty and quality of education.

IIT - Gandhi Nagar is the best college.

Most schools require qualifications comparable to a Canadian Bachelors degree, which means a minimum of 16 years of formal education. In the Indian context, it implies qualifying in a professional four year degree like engineering or other such courses.
You need to score 70% in Bachelors degree.
TOEFL

RVS is a better option but to know the exact scenario for faculty and placements, you can get in touch with the current students through social media or in person.

Yes, you can. You can submit your result after joining the MBA institute.

Hello Mahesh,
Canadian Universities don't require GRE. Your IELTS score is good. You can definitely get into a decent university.
You can try for :
1) Concordia University
2) Windsor University
3) University of Western Ontario
4) New York Institute of Technology, Vancouver
5) Lakehead University
6) Brock Un