SRM Institute of Science and Technology, Kattankulathur Eligibility

You can do B.Sc Computer Science from SRM University. But SRM is a big university and is a heavy budget college. According to me, you should do B.Sc from a mid-budget college and do your M.Sc or MCA from SRM.

Yes, as you have above 60%, you are eligible for any branch but you will have to go to the college admissions team if you have not appeared in SRMJEE.

Yes, you are eligible for M.Sc IT in SRM. You can apply for M.Sc IT.

Yes sure please appear for the SRMJEE exam in order to get a seat in SRM, Chennai campus.
The SRM, Chennai branch is the SRM main branch in India so the cutoff for that campus goes higher so you need to work hard for getting the SRM Chennai campus. Also, SRM Chennai is best than the rest of branches of SRM in area of placements, faculties, and infrastructure.
Best of Luck!!

Yes, you are eligible.
The eligibility is Bachelors degree in Information Technology/Computer Science/ Physics/ Statistics /Electronics or equivalent examination with at least 45% marks in aggregate from a recognized university.
B.Tech./BE degree holders in Computer Science/Informational Technology are also eligible for M.Sc. IT course.