Hindi

Yes, Rahil the teaching is multilingual. You don't have to worry about that. Here the teachers are well qualified and are comfortable with English and Hindi as well. They teach in both the languages with prior permission from your side. Just login to nimc-india.com and you will get all your queries solved.

Hello Manish,
Your dream is to study engineering in Hindi medium in Bangalore? It's something like studying engineering in Lucknow in Kannada. You can see for yourself how much feasible it would be. Please understand, be practical and then dream sometime something.

Please check the 3rd list of Thakur Institute and check the cutoff also and then make your decision.

The minimum criteria is-
1. Graduate or equivalent Examination with concerned subject as optional subject and Degree or Diploma in Education recognized by National Council for Teacher Education
2. Working Knowledge of Hindi written in Devanagari Script and Knowledge of Rajasthani culture
For more, you may visit then link below-
http://rpsc.rajasthan.gov.in/PDF_Reports_Files/Detail_Teacher_Gr_II_Elementary2013.pdf

It is a very good degree. You can pursue PG in Hindi literature and post that you can go for Mphil and PhD programme. This will help you get a good start in Govt. college.

For PGT job in schools, you need at least B.Ed qualification. With the only degree, you will not be eligible for any teaching job. Most of the top schools will ask for B.Ed qualification which is the minimum requirement for teaching jobs these days.
Also, if you want government teaching job then you have to qualify TET which is also the for only B.Ed pass candidates.

Yes, you surely can.
A language subject has necessarily to be included in the best of 4, so, you can include Hindi core.