B.Com

Yes, you can pursue B.Com.

you can do preparation for banking or you can do MBA through CAT MAT CAT etc.

you can start your preparation for bank exams

Different colleges have different fees. follow the university guidelines and college prospectus. U can also follow the college websites for fee structure.

Certification of CISCO is a valid qualification in networking industry. There are basic level courses such as CCNA,CCNP, CCIE etc. CCNA is only entry level course in networking, CCNP is advanced course. These courses will cover basics of networking and data communication, modes of communications, communication medium, networking devices such as modem, routers, multilexers , router configuration, LAN Settings etc. and many more topics .
Please find a popular network academy in your location and have a detailed discussion with counselor.
All the Best

MBA / M Com are the best choices after B Com. There are fellowships like Company Secretaryship-CS , Chartered Accountancy - CA, ICWA etc.which helps you touch the top most positions in IT Industry

A valid score in IBPS, help you to get placed in India's leading banking institutions with high salary. There are two type of examinations, Clerical and PO. Better take PO. After clearing IBPS, you will get offer letter from banks to join as Probationary Officer. There will be 1- 2Years probation, after that you will be placed as Officer / Asst.Manager.
You can do bank preparation along with MBA. And if you are interested in banking, better take finance as your specialization at MBA.
All the Best