Teacher

At M.S.Ramaiah there are two courses offered by the college PGDM and MBA .
In MBA there are 200 students intake and in PGDM there are 240 students intake .
In MBA in each section there are 50 students and in PGDM in each section there are 60 students.

It depends on If you want to teach in schools or colleges or tutions/Coaching . There are seperate guidelines/requirements for each. But offcourse you atleast need to be a graduate to teach. Best of Luck !

You need to have atleast Masters or else preferably a PhD from reputed institutes of the country to Land into a teching job.
Yes IIT's could go well for you. Other than that you can consider good private colleges for your education too. You will have equal/Better oppertunities from there too.

Complete your graduation. Then M. Ed.

Hi
Jamia Milia islamia, Acharya nagarjuna, JNU etc are few universities. Rest you may check here:
https://arts.shiksha.com/government-sector-in-india-categorypage-9-37-1-0-0-1-1-2-0-none-1-0

You can join helloclass

Hi
You can start with maths hons and then go for master's with b.ed to teach in schools. If interested in professorship, take NET after m.sc.