Engineer

Hey Rahul, Choice of college is completely yours, I can only tell you about benefits to be in MITSOM.
Some benefits to be in MITSOM are:
100% placements assistance
Industry experienced faculty
Big campus
Many reputed companies like TCS, Delloite, Cognizant, comes for placements.
Hostel facility
Many events happen on campus.

Robotic is a multi dicipilanary branch where both concepts and understanding of Mechanical, embedded Electronics and programming is required. Generally students do either BTech Mechanical or Electronics and then do MS/ MTech in Robotic Engineering.

Dear smit mehta.being a mechanical engineering background.you can opt NITIE bombay. which offers specialisations like Worldclass manufacturing, quality management, industrial engineering, such areas which are very much demanded in the manufacturing sector. automobile industry etc. prepare cat exam. accordingly you can choose the institutions

Indian BTech degree is recognised in New Zealand. You may check whether your Institute is in approved institutes list of New Zealand. BTech from recongnised Indian Institutes get 10 points while immigrating to New Zealand.

Firstly you need to get into a good engineering college and for that you need to have strong command in physics, chemistry and maths for clearing entrance test then the subjects will depend on which engineering branch you choose

It will depend on your experience and skills. While IIT gives you a tag, how well you do in your interview , ideas , team work etc decides your package.

Eligibility criterion for Metro train operator is three years Engineering Diploma
in Electrical/Electronic or equivalent or BSC Hons in (Physics/Chemistry/Maths) or BSc(Physics/Chemistry/Maths) from a Govt recognized University/Institute. Therefore, you are not eligible for the role of Metro team operator. You are eligible for drivers role with Indian Railways. Railways hires drivers by exam conducted by Railway Recruitment Boards.

Railways is under central Government in India. Railways hires Class I engineers through Indian Engineering Services exam. You can join Railways Mechanical branch and will then may have opportunities to work in Government owned engine manufacturing unit in Varanasi UP and Chitranjan WB. You can also appear for class II and below technical services openings of Junior Engineer for which railways conducts its own examination through Railway Recruitment Board. Railways has its own R&D department named RDSO in Lucknow. You can aslo join them for design of Railway engine and other mechanical components.

QS

Go for automobile.