BCA

Yes you can do the B.Com because there is no upper age limit. However few colleges may asked regarding this. So distance B.Com from IGNOU is the another best available option for you.

It will be good if you go for BBA or B.Com, because you have done commerce and said degrees give you an advantage when you shall join MBA in finance in the future. Now in all degree programmer computer learning is essential. Thanks and Good Luck

No, you can't do both BCA + MCA in parallely. Because BCA is in UG. And after completed your UG (BCA)course with recognised college or university with certified degree, than you can go for MCA. BCA +MCA =5 year course. You can not get both degree parallel in 3 years.

No. As yet, in JNU BCA/B.Tech is not available. Because Jawaharlal Nehru University (JNU) conducts only PG courses now. You can only do courses under PG such as:- MCA and M.Sc etc. from JNU, while you completing your UG course with certified degree. And if you want to study in JNU with UG course BA (H), so one condition is like you must be choose in 10 foreign languages such:- French, German, Korean, Persian, Arabic, Pashto, Chinese, Japanese, Russian and Spanish. Because Jawaharlal Nehru University offers UG courses only in foreign languages right now. These UG courses include BA (Hons).

Yes, you can do it.