Commerce

CA is the best professional course in commerce.

There are many options after class 12th commerce stream like:
CA
CMA
CS
B.Com GENERAL
B.Com HONS
B.E. BCA
BHM
BMS
ACCOUNTANT
LLB
B.Ed etc. The popular course is B.Com and CA.

As per your previous marks, chances are less, but still, if you try to score above 98+ in CAT then, maybe you will be callwd as an interview.

Yes, you have to add all the subjects to get admission in a school for opting commerce.

You can go for BBA, B.Com, BCA, etc.

You can go for B.Com, BBA, B.A. or BCA.

Many commerce courses are also offered at the post-graduation level. Students who wish to pursue higher studies in commerce can opt for courses like MCom, MBA, MA (Hons) in Economics, MBA in Banking & Finance and MCom in Accounting & Finance.

It depends on the college. Most of the colleges have made it compulsory for one to have Maths in 10+2 to be eligible to apply for B.Com (H). This is so, because the syllabus of this degree has a good portion of Maths and Accountancy. There are very less institutes who don't ask for Maths in B.Com (H

Yes, you can apply for the entrance exam of IIM Indore.

You cannot pursue B.Tech after commerce. You can surely enter the field of Computer Application, but not through a B.Tech course. Even when you talk about BCA majority of the colleges will require mathematics.