M.Tech Scope

It is a very niche and narrow area of specialisation. You may get job with IPR law firms, MNC R&D Patent departments etc. Less Jobs are avail but jobs in field very high paying.

Read this for future prospects in unmanned aerial vehicle engineering students:- http://hindustanuniv.ac.in/m_tech_uav.php
All the best.

ISRO time to time offers different post. You can find it on its website or in employment news or job portal. They may recruit a m.tech student as a scientist.

Most important thing is that after completing your m.tech you are eligible to become assistant professor in any engineering colleges. You can go for PhD or Research. You are also eligible to become scientist in research institute centers like CSIR, DRDO,isro etc
many key post in industry required master degree in engineering.

The specialization of any thing is special so don't worry, go for your interest. I am enlisting some key field of specialization you can chose any one .
Communications Engineering
Control and Computing
Power Electronics and Power System Microelectronics and VLSI
Electronic Systems

Additional qualification is always very good. MTech will open new door of opportunities for you. All the Best!

Yes you can do it but it only beneficial if you are in industry. If you want to do it do executive MBA instead of distance or part time or full time MBA. If you are in area related to academic or Research than ypu should go for PhD in you area of expertise.