NIT

There are so many scholarships available after class 12th
Like
1. Foundation for excellence
2. Ongc scholarship
3. Seimens scholarship
4. IOCL scholarship
5. FAEA BHEL scholarship
and many more. You should visit the website buddyforstudy. Com to get the list of some useful scholarship after 12th.

Hello Garvit, IITs and NITs don't offer B.Tech in mechatronics engineering, however, if you are looking forward to this branch only then you may check out the colleges. Link:
https://www.shiksha.com/b-tech/colleges/b-tech-in-mechatronics-engineering-colleges-india
All the best.

There is no state quota during admission in IIT colleges. On the contrary, there is 50% quota for home state board students. I mean state is no matter. Your class 12th board state is included.

It purely depends on the JEE score and not on boards percentage. After all, getting an NIT depends on the choices you have filled in the counselling and which branch you want in a particular NIT.

Yes, you can get admission in NITs through JEE Mains. Top Engineering Colleges in India accepting JEE Mains scores are mentioned at the link provided below. The ranking is based on rankings published by India Today, The Week, and National Institute Ranking Framework (MHRD). https://www.shiksha.com/b-tech/ranking/top-engineering-colleges-in-india-accepting-jee-mains/44-2-0-0-6244