Hi Mahesh,

Top 5 Engineering colleges in India are:
1. IIT, Bombay
2. IIT, Delhi
3. IIT, Kanpur
4. IIT, Kharagpur
5. IIT, Madras
They have the very best and famous for its academics in all India. They have faculties with great skills and experiences. They keep updated with new methods and care about every student's academic development.
Talking about placements, IIT's are pioneers in providing its students with placements across the board. You can get jobs not just in your core field in non-core fields ranging from management consulting to supply chain management. Almost all of the students who sit for placements (not all do as some go for higher studies) get placed in good jobs.

For admissions in IIT's, you should crack JEE Advanced.
All the Best for your future!!!