Colleges in Karnataka

Provided you do well in the entrance test and following interview, yes you can get admitted.

Unfortunately no. Christ university requires a minimum MAT score of 600. Please try another entrance exam like February MAT.

Kindly look into the placement details in the link: http://www.adarshaimit.org/plc_details.php.
The campus is affiliated to Bangalore University which is one one of the oldest university. For rankings-visit: http://www.adarshaimit.org/why_facts.php.

Yes, make a note of your percentile as well.

You are eligible for all kinds of MBA programmes and if you apply, you may get a call for the interview. You have all MBA options so if you are planning to apply, I would suggest MBA finance or EMBA. They are really good. Also, dual degree is a good option for you.

It depends on how much hardworking and lucky you are, there are packages with 16 LPA CTC (Cost to Company, means all variables and fixed, insurance and perks). The package can also go as low as 3 LPA, but the average package is 3.5-4.5 LPA. Lots of good companies will come for campus placement. What is important here is aptitude test which every company will take, GD is really tough that's when your luck plays, internship and certificate add value during the personal interview.
Hope it helps.

A composite score of 550 or above in the Management Aptitude Test MAT conducted by AIMA in either September/December 2017, makes you eligible to apply. One more requirement is that you must have 50%+ in all the semesters of your undergraduate degree.
Hope that helps.