Shri Ram College of Commerce, University of Delhi

No, SRM's merit is 90% and above. But if you clear the scholarship test then you can get admission.

SIBM, Pune does not offer undergraduate courses.

You may prefer top DU affiliated colleges over Christ University for BCom Hons as DU has better brand value and opportunities for campus placement.

It is around 7-10k per annum.

For calculating best four percentage (B.Com Honors):-
English (mandatory) + 3 other subjects with highest marks (out of Accounts, Maths, economics, Business)
Any additional subject such as physical education will not be considered as part of best four even if you score cent percent in that.
For Economics hons :-
English (mandatory) + Mathematics (mandatory) + 2 more subject with highest marks ( accountancy, economics, business)
This method of calculating percentage is not just for SRCC but for all DU colleges.

Class 12th standard has 5 main subjects. Assuming you are a commerce student English, accountancy, business studies and economics are compulsory subjects and one is allowed to choose one out of maths and IP.

Shri Ram College of Commerce comes under Delhi University.
Yes. You are eligible to get admission in SRCC.
The cut-offs basically ranges upto 96%-97% minimum marks.