B.Com

You did your B.Com 16 years ago. It would be better if you do MBA as it would be helpful in your future.

In Ludhiana best colleges for B.Com are following:
Kamla Lohtia Sanatan Dharam College
Lajpat Rai D. A. V. College
For more details you can visit:
https://www.mapsofindia.com/education/commerce-colleges/Ludhiana.html

If you want to do B.Com with MBA integrated then you can apply for LPU integrated course that is B.Com (honors) +MBA and LPU is near Chandigarh.

Yes, but not in the ones you expect to get admitted to. The scores are comparatively low and not all colleges have cut off that low.

You can do further studies like M.Com & go for lecturing if you are interested or MBA in finance or prepare for banking jobs.

BBA (Hons) do have better job opportunities.

No, for animation course, either you have to take B.Sc with animation or individual course for animation, you can choose.

CMAT score of 71% is too low.
But, you can try for PGDM and do extremely well in the GDPI rounds to stand a chance.

You should have pass with 60% and have to give entrance test for PU.

For sports quota, you can get into SRCC even if you have your percentage in 60s.
But you need to have a very good record in your field of sports. And also, you need to give trials.
For OBC, parents annual income certificate is checked to know whether you fall under creamy or non-creamy layer.
For SC/ST, you have a lower cutoff percentage. Usually comes down to 80s.
But, you can't apply for two reservations. Either you choose Sports quota or SC/ST/OBC quota.