Business Management Studies

All the MBA colleges affiliated to Maharashtra state universities accept MAT score.

Requirements are:
A four-year Bachelor's degree from an accredited US institution or its international equivalent.
A minimum of two-three years of work experience, depending on your responsibilities.
Resume
Personal Statement
Two letters of professional recommendation.
Proof of English proficiency (TOEFL is the most common requirement- minimum scores: paper-based: 550-=600 and computer-based 213-250).
GMAT score of over 600 (probably the most important thing).

An MBA will surely help you increase your career prospects. I would suggest you do MBA in marketing.
https://www.shiksha.com/mba/colleges/mba-in-sales-marketing-colleges-india

That won't be a major issue. If you get admission in a college. Your low marks could be overlooked if you have a good score or rank in the entrance exam.

That's hard to say. You have good scores in the end, but your initial scores are pretty low. I would say that chances are 50-50.

Institute of Hotel Management, Catering and Nutrition (IHM). Welcomgroup Graduate School of Hotel Administration. Institute of Hotel Management, Catering Technology and Applied Nutrition (IHM), Mumbai.
Institute of Hotel Management, Catering Technology and Applied Nutrition (IHM), Bangalore.
Click on this link for more college details:
https://www.shiksha.com/hospitality-travel/articles/top-10-hotel-management-colleges-in-india-blogId-10022

MBA/PGDM from a reputed B-School guarantees a good placement provided you have the required skill set for the particular job and are able to demonstrate the same well during the interview.

Airline pilot with an average salary of starting from $20-$50 PR hour.