IIT

I think you can get top NITs with this rank.

In which state are you looking for?

Hello,
Yes, you can get good IITs by such a good rank. Please see the closing rank by JOSSA for different IITs by the link provided:
http://josaa.nic.in/Result2016/result/OpeningClosingRank.aspx

Hello Sonu,
These days admissions are strictly done on the basis of other entrance exams. Without this evil, there is normally no admission in engineering colleges. Depending on your rank, you will get the college. The best colleges are NITs.

Not at all. There are students from various fields like commerce, arts, medical, as well as Non-IIT's and Non-NIT's.

No, actually, the real reason why they are upper in rank is that the total number of research papers published, number of placements, number of GRE and GMAT qualifiers and many other factors form that ranking.

Hello Zeeshan,
Please follow the link provided here, you will get the complete details about the closing rank of all IITs:
http://josaa.nic.in/Result2016/result/OpeningClosingRank.aspx

First, you join good institute near you like TIME, IMS, Career Launcher, etc. So that you get a better idea of how to solve Questions Papers, Basics, Tricks, etc.
But just joining an institute is not okay.
You have to work hard, keep practising maths problems, logical reasoning, English grammar and all.
As you said, you are in the 2nd year so first, you have to focus on your graduation that is also important, start preparing for CAT in last year or I would advise you to after B.gain 1-2 years of work experience after B.Tech and then go for MBA as it would be better for your admission and placements.
Best of luck.