Accounting & Commerce

BBA will give you a wider scope in all the aspects of management, whereas, BAF would be more focused on the accounting and finance aspect of the business.
It depends on your interest.

As a B.Com graduate, you have options of doing higher studies in such as M.Com, MBA, MCA or PG Diplomas or industry certifications. M.Com focuses on commerce, accounting, management and economics related subjects and prepares you for Finance and Accounting jobs in enterprises. MBA is a generic cours

Yes, you are eligible. But, you need to crack CAT exam and GD/ PI process to get admission in IIM.
Good luck.

You can clear CA CPT in first attempt, if you will practice mathematics consistently. For this, you have to join mathematics classes and practice regularly. You should focus on those topics or chapters, which you can understand better.
Best of luck.

NIEM is the best college. It is a one year course.

If you are looking for management courses, then you can pursue:
1. BBA.
2. B.Com.
3. BCA.

If you have an inclination for business, marketing, finance, etc. you can think about B.Com honors or economics honors. If you have an interest in writing, then you can choose journalism course.