It is difficult to predict the cutoff as it depends on various factors. Going by last year cutoffs, the cutoff mark for OBC Category through 85% state quota was 523 out of 720 while cutoff through All India Quota was around 600. To be on safe side, you should try to score around 550 marks if applying through state quota. The course fee is affordable as it's a government college. It costs almost 50,000 INR every year.

https://www.careers360.com/colleges/bangalore-medical-college-and-research-institute-bangalore/mbbs-course