B.Com

These are very good marks for programming but for hons you might get some trouble in admission. But yes you are eligible for B.Com (Hons) or programming. You can get the north campus colleges in programming and for the hons you can get good off campus colleges with out any doubt in DU.

No, it is not at all compulsory for any field even you can do self study and that will work.

Yes, you can do after taking Science you can do any course whichever you wishes to.

The cutoff for general category students are-55%
There is a relaxation in cut off for sc/st students -50%

The fee structure is about Rs. 45,000 annually and you will get some scholarship also after giving entrance test.

This is the most reasonable fee structure. I would highly recommend it. It is about Rs. 22,500 annually. You can easily pay it out.

Yes, only after you complete your B.Com and attempt entrance exams you are eligible for MBA Admissions.

Yes, you can do MBA or MCA.

Yes, you can do MBA Write PGCET exam first then see according to your rank and decide.

According to this year's CUET, Admission will be provided on 'Normalised Scores or Indexes' not on 'Raw marks'
CUET BHU B. Com (Hons) criteria Index marks would be calculated by adding these 3 papers :
Accountancy, Business Studies and General Test.