Teacher

Yes, there are some colleges which recruiters through GATE exam. But, government college not.

Yes, you can pursue B. Ed as you have teaching experience but first of all please check the eligibility criteria.

Yes, you can apply for B.Ed from IGNOU as you were primary teacher but first of all please check the eligibility as they ask for two-year experience. If you fulfill the eligibility criteria, then you can apply tor the same.

Post this on job sites for better response. I would suggest internshala, naukri. Com, LinkedIn etc.

It depends on your ambition, I mean where you want to see yourself after the completion of the course. If you are more towards banking, insurance accountancy or finance related in terms of interest, then Finance can be good choice. But if you are more interested in aspects related to market and market scenario as well as about market segments and you have ideas aggressive enough to please a customer, then Marketing is not a bad choice.

Please have a visit to the following link :
https://www.shiksha.com/mba/colleges/mba-colleges-in-Kolkata

There are so many options in india for becoming a teacher. So many fields in which you can complete your Masters then B.Ed completion you can be a teacher.

Yes you can become a mass communication teacher once you complete your BEd.

For a PGT teacher you must complete B.Ed in this field.

You can find it here :
https://www.shiksha.com/exams/ntse/application-form