B.Tech Scope

Of course, USA is one of the top countries for the same.

Yes you will definitely. All depends on the kibd of premier and Tier1 college u get admitted in and the amount of hardwork you put in. Keep reading newspapers and books and be abreast with technical management knowledge.

As is understandable from the name. Automobile is focused on Automobiles. But Mechanical Is a very diverse core brance. Everything you can see feel around you is mechanical in nature. Or requires concepts of mechanical engineering.
Thus i would advice as you to keep otions open and take Mechanical Enginnering from good colleges like BITS, Lovely Professional University, SRM etc. Once you get in final year you can choose specialization as Automobile engineering.

Dear gauarv ! this is an excellent university but there are better private universities that provide assured placement.some of these institutes are:
1.Lovely Professional University
2.Symbiosis
3.KIIT
i have heard that Lovely Professional University venture in their students unmatched entrepreneurial skills that makes their students easily employable.even this university provides an excellent platform to showcase your skils.
choose wisely.

it is not compulsory to do ms or mba after btech but if u'l do it den dat will make alot of difference. i would advice you to do either of them.
all the best

yes definitely you can do mba after doing btech