M.A

Hello,
Yes, there are many universities including the famous open University located in Delhi, IGNOU, that allow engineering graduates to take the course of post-graduation MA in English. You can download the brochure come application form from the website of IGNOU and fill it up. The courses normally begin twice a year. You need to upload certain documents pay the fees and you are into M.A. In English. Best wishes to you.

Yes you can do the M.A. History after B.Sc. Please write the college name for better response. However the eligibility criteria of LPU is given below for an idea.
Eligibility criteria of LPU for M.A History : Pass in Bachelors Degree (any discipline) or equivalent.
Eligibility criteria of M.A. History of DU : An Undergraduate Degree from Delhi University or any or other recognised University Degree other than BA (Pass/Prog./Hons.) / B.Com. (Pass/Hons.)/ B.Sc. (Gen./Hons.)/M.A./ M.Com./M.Sc. (e.g. B.Tech. MBBS etc.)

Yes, it is very much possible. IGNOU provides it.

As far as I know it can't be pursued in Hindi.