CBSE 12th

No, it is not necessary to take computer as a subject for BCA as you will learn from basic itself from the very first year, but it is necessary to have some basic knowledge about what you are going to opt for.

This would depend on your interest areas. CA is an excellent professional qualifications & one can pursue it along with B.Com. You need to clear the CA foundation open test to seek admission into CA course.

To get into IIMs, FMs, MDI you should at least score more than 96 percentile at CAT. So, prepare well for CAT and go for it.

Well, you really have a good curriculum background but still, you have to score well in CAT exam at least above 98 percentile to be on a safe side for IIM-A.

The announcement by MHRD, the revised criteria of 75% marks (Gen Category), 65% (SC/ST/PwD Category) or being in the top 20 percentile in class XII is likely to be applicable for admissions to all NITs/IIITs/GFTIs along with IITs from the admission year 2017-18 onwards.

Dear Aprajita,
Firstly, you cannot skip your 2 years of college education for getting graduation from distance education form Mumbai university. You first complete your college and then you can get admission for any graduation course from distance education in Mumbai.
Regards,
Deepak.

If you want to get admission for B.Tech, you need to appear Amity JEE first.

Hi,
To apply for the course:
ELIGIBILITY CRITERIA
The candidate must have passed 10+2 from any recognized board in a relevant stream.
ADMISSION GUIDELINES
Candidates from Boards other than Tamil Nadu State Board, CBSE, AISSCE, and ISCE must produce Eligibility Certificate from the University of Madras.
Candidates must be below 21 years of age.

After 12th, anyone can get admission for BCA. However, many institutes take a written exam procedure.
Fill up application form online/offline as per institute.
Check your name in the merit list.
Check every time for timely updates from the institute.

You have not mentioned, in which course you want to get admission. If you have done 12th with PCM (non-medical), you can do B.Tech, If you have done 12th with commerce you can do B.Com or BBA and after MBA. For getting admission you should fill-up online/offline admission form. Take part in counseling of University or College. For more information contact your selected college or university administration.