Accounting & Commerce

Yes definitely CS is possible after your M.B.A. Start going to coaching classes and preparation.

I will first advise you to analyse as to why you received so less marks in B.Com. Was it tough for you to study? MBA is much tougher than B.Com hence caution. Also, a majority of good institutions demand at least 60% in graduation.

You can apply with these institutions for distance MBA programme:
Symbiosis
IMT-Ghaziabad
Sikkim Manipal
AIMA
ICFAI
Amity University
And you can choose dual specialisation as finance and marketing or HR as per your future aim.
All the best.

Certificate in Accounting Technician course i.e. CAT is offered by ICWAI (ICMAI). It will be an added value in your academics. To be proficient in accounting, you can pursue CAT+ADCA (Advance Diploma in Computer Application) from recognised training institutes.

For you, Symbiosis Institute of Business Management, Jamnalal Bajaj Institute of Management Studies, International College of Financial Planning-Mumbai and XLRI will be the good choices for MBA.

MBA in Finance is the logical next degree for B.Com graduates. You can prepare for MBA entrance examination along with graduation degree. But, if you are not sure of cracking CAT or XAT, you can drop one year. Devoting one full year for MBA entrance exams preparation has its own merits and demerits.

Pursuing MBA with work experience has a definite advantage over students who don't have work experience. At the time of campus placement, one gets the advantage and also one is able to relate well to the concepts of management that are taught in the MBA.

Solve questions based on quantitative aptitude, logical reasoning, English and data interpretation. Look out for sample papers or previous years papers of IPU or MAT and CMAT type of exams on different websites.

If it's just for the sake of graduation, then let me tell you that it really doesn't make any difference. But they both have different learning perspectives. B.Com is a general degree which is offered by most of the colleges, whereas, B.Com (PA) is offered by some colleges and includes more exposure

There is no entrance test for undergraduate courses. You will be screened on the basis of your marks in class 10th and 12th. Whereas, generally entrance tests have subjects like quantitative aptitude (mathematics), logical reasoning, data interpretation and English.
I hope this helps.