B.A

You can pursue 2 courses simultaneously but not from the same university.

To be eligible you need to have passed 10+2 or equivalent from a recognised board or you must have passed BPP with PSS from NSOU / Passed 10+2 in vocational courses from a recognised board.

You can apply online/offline with the required information. Admission is based on marks obtained in the entrance examination conducted by the university.

The fee is around Rs 4,000/-.

Switching from DU to IPU will be a bad idea. I would suggest not to do that, instead option for Masters or PG in marketing ones you complete your graduation. Switching now, when you're already in 2nd year will be a waste of time.

BA from DU is better than BBA from IPU because DU is a government university whereas IPU is semi-government. You get a brand name tag when you are a DU pass-out where as an IPU pass-out has to struggle more to get into the market.

Along with current affairs, you need to polish your English and general science. You will be asked some synonyms-antonyms and basic grammer. Also, you need to know science related to radio and camera.
It is best to refer a journalism entrance exam book. These books are easily available in market. You can also browse for such questions with answers on internet.
Hope this will help you.
All the best.