B.Com

Dear,
If you like this subjects than you may choose any of the options for your further education:
1. CAT/MAT/XAT/GMAT/NMAT /SNAP competition exam for MBA in finance, international business, insurance or marketing.
2. Actuarial science
3. Competitive exams for Bank jobs
4. Development Studies
So choose the field according to your interest and calibre.
All the best.

Hello,
Yes, you can pursue B.Ed after completing B.Com but the subject should be same.

Yes, you can do both together, CA is certification course whereas B.Com is a degree course. You need to clear IPCC both groups before you attempt final CA examination.

B.Com Honors is a good option. It is good to do MBA in marketing after completing B.Com.

To be honest, 51 percentile in any MBA entrance exam won't fetch you calls from even the average B-schools. I advise you to study hard and try cracking these exams starting later this year. A great percentile and a decent GD-PI round should fetch you admission into the choice of your B-school(s).