Law

Refer to the link below and check out the top LLB Colleges:
https://www.shiksha.com/law/ranking/top-law-colleges-in-india/56-2-0-0-0.

If you are a college graduate, you are eligible for 3 year LLB course. Prepare for various law entrances and appear for them this academic year.

You can also go for B.Com LLB, it's a new course started in various universities. It is also a good option and has a wide scope in future.

Yes, for LLB. Your graduation marks will be considered for admission.

No, it is not. National Law University, Delhi (NLUD) is a law university in India, offering courses at the undergraduate and postgraduate levels. It is situated in Sector-14, Dwarka, New Delhi, India. NLUD is one of the national law schools in India built on the five-year law degree model proposed and implemented by the Bar Council of India. The statute provides for the Chief Justice of the High Court of Delhi to function as the University's Chancellor whereas the Vice-Chancellor functions as the chief administrator.

Please refer to the link below for top colleges:
https://www.shiksha.com/law/ranking/top-law-colleges-in-india/56-2-0-0-0
I can not guess what can be affordable for you, you may see the fee yourself.

Yes, you can join but you need to have atleast 45% - 55% to enroll in the Bachelor's degree in law.

You can give CLAT exam to pursue LLB (Bachelor's degree in Law).