B.Tech Computer Science and Engineering

Try if you can get into NIT with this rank. May NIT, KUK, if you have some reservation as well. Or some low rank NITs.
Then next you can try for colleges under IPU. If you get a good college there, then you go for it.
In case both of above do not work for you, then you can again go for colleges on the basis of JEE score. Like YMCA Faridabad and similar government colleges.

Amity University is not a name, it's a brand. It is one of the best universities in India. If you are getting admission in any of the campus, kindly take admission in it, it will be best for you.

Computer (Systems) Engineering enables students to engage in the design of integrated hardware and software solutions for technical problems. They are involved in many aspects of computing, from the design of individual microprocessors, personal computers, and supercomputers, to circuit design.

PIET college offers a variety of placement offers for every field. The placement cell trains students well. If you are from Piet, talk to someone at placement cell. If you are someone seeking admission, go on and check the records of 2016-17 placement for different branches.
You will get all doubts cleared.
I hope this works for you!

Hello,
Check here to know about best engineering colleges in Delhi:
https://www.google.co.in/url?sa=t&source=web&rct=j&url=http://www.shiksha.com/b-tech/ranking/top-engineering-colleges-in-delhi/ncr/44-2-0-10223-0&ved=0ahUKEwjQ2ffO57LUAhWKr48KHX-0BbwQFgiLATAD&usg=AFQjCNFKHefe0fLv3tPN3BAoxv_HrKjCfg&sig2=GPrmKODZ6xnZwPmtMJ_nGg

If we look at the general view, in today's time if you want to get good CSE placement you need to work hard yourself on your coding skills irrespective of the college choice.

No, both are different from each other. In B.Tech computer science engineering, you will study hardware and software and in B.Tech animation, you will study animations effects in photos, videos, etc.