B.Com

National Law Universities established by Government of India are the best option for doing 5 years integrated programme of law. If you can crack CLAT then it's the best option to become a lawyer. It will be very good for your career and above it, you will save one year of education.

BBA will be better option for you as commerce student. BBA is a job oriented professional course and BBA's syllabus has some similarities with MBA. So, if you are planning for MBA for higher studies then BBA will help you a lot.

You can check the list on: https://goo.gl/In5XUr

Definitely, SRCC is the best college but it has a very high cut-off.

B.Com (Hons) graduates can fingood d scope after completion of B.Com Honours course in accountancy and finance. You can pursue M.Com accounting and finance after completion of B.Com (Hons) course. You can get job roles such as, Risk Analyst, Market Analyst, Operations Manager, Finance Manager, Investment Banker, Money Manager, Accountant or Financial Analyst.
Top Colleges offer B.Com (Hons) in accountancy and finance:
Amity College of Commerce and Finance
St. Xaviers College, Kolkata
Sri Ram College of Commerce
Indian Institute of Management and Commerce
Khudiram Bose Central College

There are 3 levels in CA:
1. CPT
2. IPCC
3. Final.
If you have done B.Com with 55% marks then you get exception from giving CPT. You have to just give IPCC and final.
If you have already completed B.Com, then it's good that you don't have to give CPT and you will take around 3&1/2-4 years to become CA.
But if you are in 12th or in 1st year of B.Com, then why to waste 2-3 years. Start as early as possible. You can become CA in 4&1/2 years.

Hey, you can manage both MBA and your work. Opt for executive MBA from a good university as it will surely pay you off pretty well.

It is not necessary to do B.Com from big cities. It is better to do B.Com from colleges near hometown so that return on investment is higher. Also, you must do B.Com from colleges which have good academics environment and faculty members.