M.A Eligibility

Yes, it is possible. Although, it will be helpful to your Master's degree, because of law. All the best.

Eligibility Criteria : Candidate must be a graduate from a recognized university.
Go through the link below for more details :
https://www.shiksha.com/humanities-social-sciences/anthropology/course/m-a-in-anthropology-mahatma-gandhi-antarrashtriya-hindi-vishwavidyalaya-wardha-273150

Forms are available online. You can apply for the same.

Eligibility required for admission:
1.Minimum 45% required in graduation.
2.Candidate must have studied Urdu as main language or optional subject in Degree or Equivalent examinations.
2.Candidates from affiliated subjects i.e. Arabic & Persian are also considered for admission.
*Admission is based on the marks obtained in Graduation.

No, you must have graduated in economics and you must have scored 55% aggregate marks. After that, you are eligible for Masters program in University of Pune.

The minimum eligibility criterion required for the candidates is to possess a Bachelors degree in English or relevant discipline from a recognized university with a minimum aggregate score of 60%. Admission to MA English is done on the basis of entrance tests.

Yes, you should have a graduation degree and that's all for doing MA.

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