Full Time B.Com

You can get a job as a financial analyst or financial planner. As you have done CS, so you can get an option in finance ethics in which a cross check of entries has to be done. Otherwise, you can get a job in the finance department.

No, it is impossible to complete both B.Com and MBA within 3 years under Indian education system. You have to complete 3 years of graduation and then you have to go for 2-year MBA.

You can refer the link mentioned below:
http://goo.gl/tLPA7K

Dear aaisha,
Both are different field with different prospect and scope . I would not recommend you to proceed.You should choose the programme according to your future planning , don't put your legs in two boats.
But you like creative field more than b.com than you would go interior degree as full time and b.com as distance mode from different University.
All the best

Its always advisable to opt for a regular course.

Along with B.com you can pursue any diploma in any field of your interest. You can also prepare for civil services.