B.Com

You should appear for the re-exam of the subjects in which you have failed.

After completing your graduation, you can get placed as a sales executive in the loan or insurance department of leading banks.

Dear Ashish,
If you are only interested into subject specialisation, than you can go for M.com. However, if you believe into overall exposure to get all round knowledge, than it is advisable to pursue MBA. It will provide you with the live exposure of the challenges that management faces. The key to handle various situations into business can be better learnt through MBA. I hope this would suffice. All the best and God bless you.

You should pursue MBA after completing B.Com. It has a great scope.

Of course, you can do automobile engineering from any college as per your choice. It is the best branch in engineering. If you are interested in engineering then you should opt for the same.

You need to complete M.Com and qualify NET exam.

As far as I know, no reputed B-school allows candidates having backlogs pending in their graduation. So, you need to clear all the backlogs in order to stand a chance of getting admission. Moreover, the academic session of almost all the B-schools has already started in June-July so you have to anyways wait till next year.