NIT

No, you only need to qualify JEE Mains exam to get admission in NITs.

Hi,
Check out the predictor below :
https://www.resonance.ac.in/reso/news/JEE-Main-Branch-Predictor.aspx

You will be able to get admission in IIT/ NIT if you have done your 12th board from a recongnised board even as a private candidate. Your 12th board marks sheet and certificate will be sufficient proof for your education.

You are requested to confirm your preferred branch of engineering for an appropriate advice.

Fees of the University of Saskatchewan is very low but it is one of the most reputed universities of Canada. Since your score is average, you must try to score over 6.5 bands in IELTS exam to get admission there. All the best.

For NIT CS, you need at least 200 marks.

It might be possible, if you are from SC/ST category.

Can you share your scorecard so that we can give you an appropriate answer?

I think NIT Warangal is the only NIT which offers specialisation in automobile engineering.

If I would rank these two colleges (MNIT and MNNIT) on the basis of campus, hostel life, placements, faculty, and infrastructure, then I would suggest you MNNIT.
As for MNNIT - Allahabad, from what I know from my friends who went there, it's great for someone interested in the core branch as well as the teachers being so supportive for someone pursuing his/her passions.