Accounting & Commerce

You can refer to the following link -
https://www.shiksha.com/college/oriental-school-of-hotel-management-wayanad-20810

For foundation, you need to pay 4500 for registration fees
And for the exam, you need to pay 1200.

Yes, it solely depends upon you. If you can manage your studies you can study both the course. But as per my POV, you need to focus on one course after a clear one you can go for a second. Otherwise, it will be hectic for you to manage both courses at the same time.

No you need to pass out 12th for applying in CS programme.

You can apply for BAT after completing your graduation.

Yes you can pursue CS as there is no age bar for pursuing it. Go for it. All the best.

Do you want to do Phd. Or you're looking for jobs.
If possible elaborate more.

For correspondence, IGNOU is best for pursuing any graduation course as its fees in less as compared to another institute. Also, it is widely recognized by corporates and people.

You can do any distance course in management or commerce after graduation.
As for CS, you need to dedicate your time for induction and other things. You should pursue your PG course on a correspondence basis as it will help you in getting proper time for CS preparation.

You can do BBA B.A. Economics Hons. B.Sc. Eco. Hons. As CS didnt restrict it only for B.Com.
You can appear in it through any graduation course.