Philosophy

Yes, you can change your profession to philosophy but only if you feel that it is good for you. Before going into this field, you should analyse this field and find it is compatibility with your interest.
You can find the list of best colleges in India and you can find the information regarding admission, eligibility on the same page:
https://www.shiksha.com/humanities-social-sciences/philosophy/colleges/colleges-india

Yes. There are too many colleges which offer M.A. Philosophy in distance educationas IGNOU, Kumaon University, etc. In my opinion to have to do M.A. Privately. Every university which offer MA, you can do it from there.
Good luck.

Hey buddy,
National Law School of India University (NLSIU), Bangalore offers law courses to aspirants at the undergraduate (UG), postgraduate (PG) and doctorate (PhD) level. Candidates can also pursue law programmes in the distance mode from NLSIU.
for further information do visit this link
https://www.shiksha.com/university/nlsiu-national-law-school-of-india-university-bangalore-483/admission
I am not sure about the Diploma but NLSIU regularly conducts certificate course in Medical Law and Ethics.
Hope this helps!!

It depends upon the course you are looking for. Some courses offer separate entrance examination but others courses are distributed as per the individual cutoffs. You can fill University forms and check for the course you looking for.

For admission in MA in human development studies you must be a graduate from B.A./B.Sc. (Hons.) in social science from a recognized college/university.

Candidates who seek admission for the course are required to meet the following eligibility criteria which are as follows:
Graduation (BE/B.Tech) in a relevant discipline, with a minimum aggregate score of 55% (50% for SC/ST candidates), completed from a recognized university.
Work experience of a minimum of 1 year, as most institutes prefer candidates with professional experience.
Students in the final year of graduation results impending are also welcome to apply for the course, however, admission to such students is made provisionally.

Depends on the college in which you are applying. Some colleges have both the medium of education I. e; English and Hindi.

The official website says candidates should have philosophy as one of their subjects in graduation or candidates should have graduation from national/foreign university recognised by BHU and a post graduate diploma in Indian philosophy and religion with 50% aggregate at both the courses.