Netaji Subhas University of Technology

Pursue it from DTU. DTU had good faculty for COE and will definitely make you land at you destination.

It is absolutely true. Admission to above college is though JAC counselling and all above college had 85% state quota. By Delhi students, it basically means the one who had done class 12th from Delhi region.

Yes, it's there. It would be better if you do your 11th and 12th from a Delhi School. Your domicile could be outside but your schooling depicts the state you qualify for.
It will enhance your chances to be at DTU/NSIT in comparison to outside Delhi Schooling students.
Hope this helps you.
All the best for your bright future!

If your aim is teaching, B.Sc and M.Sc would be surely enough for it. But if you want a decent placement and a job, you should definitely consider B.Tech. You can apply for various universities providing B.Tech degrees and then proceed.

NSIT is best for B.Tech CSE because NSIT
provides good quality of CSE faculty members. NSIT also provides good computer labs.

Getting into VIT is easy than NSIT but I'll say both are almost equal. I'll suggest you to go with NSIT if you're talking about government NSIT.

No, there are no special reservations for that, priority might be given to students of Delhi in some cases but no special reservation category.

NSIT is the better college than VIT and BITS because NSIT has a good placement record as compared to VIT and BITS. NSIT is government college also.

DTU is better than NSIT. U should prefer DTU over NSIT . It gives much better placements and academics compared to NSIT.