Teacher

A good score in the NET exam always helps. You can get a job by applying when the government universities release advertisement for recruiting professors, they conduct an exam and if you pass it then you are almost good to go. Just an interview follows, usually. Also, in the meantime, you can start teaching at a private or deemed university. Experience always counts positively.
There is also a provision of teaching along with pursuing Ph.D. Look into that too.

He/she has to complete his Masters and then he can opt for UGC NET or M.Phil.

You have to clear or complete your Bachelors degree with 50% or more marks with B.Ed. courses. Masters degree is preferable.

Yes, you can get it. Meanwhile, it is recommended that you develop an experience of at least 3 years so that you can qualify for entry position into IIM's teaching faculty.

You can do graduation in relevant subjects and for deep knowledge and better position, you can go for Master's degree.

Yes, B.Ed is accepted as a qualification for teacher placement across the country.

You can try for MA in economics or else MA in English and you need to clear NET exam in order to enhance your career in teaching.

Hi,
Every state in US have different requirements for teachers. You must hold a teaching license most importantly. For job related information please visit a leading job portal.

Yes, you are definitely eligible.