B.Sc

You score in too low but college will call you every student for GD-PI process.And it will depended on interviewer and they want to ask( may be they ask about current issues or your education background etc ). Yes college is very good for HR. Average package of college is 6.5L.

There are various universities which provide distance learning or you may just visit Sikkim Manipal University.

Long duration required to gain or enhance you art or creative skills. You can opt for B.Sc or even you can go for B.Des.

A lot of job opportunities are available in private sector for graduates in B.Sc Electronics. Jobs are available in both hardware and software fields. For example:
1) Software testing
2) Electronic design engineer
3) Technical executive
4) Chemical administrator
5) Technical support associate
6) Software developer

If you really like chemistry, I would like to suggest you to make your future bright in this field. Chemistry is a really very good subject and it has a lot of career opportunities. Biotech could also be another good choice if you are really interested in it. This one has huge opportunities but out of India.

Yes there is a post graduate 2 year (MA in econometrics) course available in University of Madras and IISc Bengaluru. It is basically an economic course which is concerned with the use of mathematical methods to describe the economic systems. Eligibility to pursue this course is any degree in economics/maths/ physics/engineering with minimum 50% marks.

MMS doesn't include any gdpi , and with this percentile is difficult to get into MMS.
Try applying for pgdm , and apply through cat scores, or wait for the next exam and score better.
The last date to submit the form is 27th Feb and the process will start there after