CMAT

You can check the below mentioned list of the top colleges with CMAT score cutoffs:
https://www.shiksha.com/mba/ranking/top-mba-colleges-in-india-accepting-cmat/2-2-0-0-5822

Hi,
With this score, it is very difficult for you to get an admission call from Christ University as the minimum score should be 600 in MAT. Though, you may get a call for WAT/ GD /PI rounds, but the entrance exam scores also hold higher weightage in your selection process. If you will do extraordinary well in WAT/ PI, then there are chances that you can get admission call from there.

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

IMT Hyderabad and Nagpur are good and even Christ University, XIME Bangalore are good.

Chances of getting a call are less. Though if you get through, you need to give a good WAT PI test which will decide further course of admissions, Goodluck.