Science

You can apply for admission only if you fill the registration form, so you should fill the same and also visit the university website for the eligibility criteria.

No, there is no interview in IISER admission process.

One of the ways to get into MS course in India is through GMAT. You can apply for GMAT. It's an international level exam conducted across the world. Many top institutes of India accept GMAT score.

You have the option of doing an integrated course, but not dual degree courses. Maybe that would be on offer in the distant future.

To get admission for B.Sc in Forensic Science, one should have completed class 12th with PCM/PCB. However, to pursue B.Sc Physics, Chemistry and Forensic Science, one must have done 12+2 with PCM subjects. Whereas, to pursue B.Sc. Life Sciences, Chemistry & Forensic Sciences, one should have studied PCB/ PCMB.

This Indian Board of Alternative Medicine should be best avoided. Apparently due to police action, it has suspended all operations. I am attaching a link that will explain.
https://www.altmedworld.net/

In year 2017-18 at NIT Trichy, the total 97% of students gets placed in various companies. While in year 2016-17 this was about 98.5%. The average salary package is above 6 Lakhs per year.

Your score is very low and chances for admission seem very less. You should try scoring more marks next year.

Entrance test pattern for M.Sc in Counselling Psychology.
In Part A, qQuestions will be asked from the following topics-
1. General Aptitude
Logical and analytical reasoning, Decision making, Linguistic skills (30 questions)
2. Basic Psychology
History, Schools of thought in Psychology; Perception, Motivation, Personality, Learning, Social psychology (15 questions)
3. Current Affairs
General knowledge/ awareness about world around us (5 questions)
4. Research Aptitude
Basics of research methodology (5 questions)
5. Ethical concerns (5 questions)
Part B consists of Counselling Psychology.