MBA Entrance Exam

PGDM - Rs 3, 60,000 per year (including formal suit, fee for peregrine evaluation, and industry visits).
Average placement is Rs 4.7 lakhs per annum.
Generally, if you get 70 percentile or more in any of the tests, you get a call for GD/PI. Your selection depends on your performance for the same.

You can apply in BIMTECH as the minimum percentile required is 70. It can provides you sustainable job with good salary. You should be updated with current financial news and market news to crack PI.
Good luck.

Yes, you can go for Marketing stream. You must choose the stream in which you have interest. Marketing do have good future scope in the field of Market Research, Digital Marketing and Retail Marketing. You can very well opt for that.

Chances seem less at this score, the cutoff is above 75-percentile.
https://www.shiksha.com/mba/course/master-of-business-administration-faculty-of-management-studies-baroda-fms-baroda-vadodara-112403

You need to appear for NMAT and have valid decent score in HSC examination to join 5 year integrated program viz. B.Tech+ MBA or B.Pharm+ MBA offered by Mukesh Patels NMIMS.

You may refer to following link for list of top MBA B-Schools which accept XAT score: https://www.shiksha.com/mba/ranking/top-mba-colleges-in-india-accepting-xat/2-2-0-0-309.
In addition you can appear for IIFT or IRMA exam to join these B-Schools. You can appear in SNAP of NMAT which will help you to get admission in their top B-Schools.

There is no college bias in IIM selection. Selection is purely based on meritocracy. If you crack CAT and do well in GDPI you stand fair chances to get selected in IIMs.

You may refer to following link for list of top MBA B-Schools accepting MAT score: https://www.shiksha.com/mba/ranking/top-mba-colleges-in-india-accepting-mat/2-2-0-0-306

It depends upon the IIM you are targeting, every IIM has different criteria to select students and give different weightage to the graduation marks. Having said that, if there is a genuine reason why you were not able to complete your degree in time, it can be taken into consideration because there are high chances that even if you are able to crack CAT and sit for an IIM interview this question can be asked. Prepare your answer well. Don't lose hope and start preparing for CAT, the sky has limits. All the very best!!