M.Tech

Clear English Proficiency Tests such as IELTS, TOEFL etc as applicable to your university with demanded score.

If you are good in your subject and feel that you can contribute more to the growing world of technology, then ME is a good choice. If you are confident of your managerial skills and wish to climb the corporate ladder then MBA is a good choice.

If you have some doubts on your choice, better take up appointment with some company of your interest. Get some experience and then decide on further up gradation.

Power System Engineering is a better option for job in comparison to Power Electronics specialisation in M.Tech EEE.

Your query is pirely absurd

If you do part time M.Sc IT from a recognized university then you are eligible for M.Tech.

Yes, it is possible for you to pursue M.Tech in different branch. Although, it may vary for different universities but most of the universities allows you to pursue Masters in any specialization of your choice. You can browse universities like JNU, Anna, Lovely Professional University etc for more information.