BBA

See, you have a very bright prospect with regard to MBA. Try learning concepts carefully and start your preparation for CAT from today itself.
Getting into ToP B-Schools will make your future.

It's not necessary as generally, you get admission on the basis of your HSC marks and in some cases, you need to appear for an entrance. If you are good with your HSC concept, you will make it even without a coaching.

You can go for:
A foreign language course.
distance courses.
Programming language courses
various diplomas.

Hi,
Its not compulsary to opt for maths in HSC for the course that you mentioned. But ideally, its preferable to opt for maths as you may require those skills in your future. Also, in case you change your plan and want to opt for something else after 12th, maths is preferable.
All the best.

Hi,
Ideally, try and get into the top 50 or 100 B-schools for MBA.
All the best.

MBA/MMS/PGDM is the preferred option after BBA. If not MBA you can also opt for LLB/ CA/ CS, etc. or join some short term diplomas or certificate courses in your preferred subjects.
All the best.

Hi,
You can opt for short term diplomas or certificate courses in your subject of choice. You can also join some computer course or learn a new language.
All the best.

Hi,
You can opt for short diplomas or certificate courses in your preferred subjects. Also you can join some computer course or learn a new language.
All the best.

Hi,
You can opt for some diploma or short certificate courses in subjects like management, business etc. You can also some computer course or learn a new language.
All the best.