The cutoff for St. Johns Medical College Banglore was around 686 TO 469.

The past years cutoff Rank  were around 15000-16000, So you should try to score something 500+ this will keep you in safe zone and you will get a seat in the college.

You need to prepare for the entrance exam  well.

For any further details you can visit the official site of  the college:

https://www.stjohns.in/medicalcollege/

you can also check out this link to get some additional information related to college cutoff, admission process etc.:

https://www.careers360.com/colleges/st-johns-medical-college-bangalore

Hope this helps.

All the best!