Course duration for B.tech or B.E is 4 years.

Fee structure of the course depends on the college in which you take admission.

Please specify the name of the college?

If you want to do aerospace engineering you should try to get admission in IITs, IIST and IISc Bangalore.

For private colleges you can go in BIT Mesra, Amity University and Amrita School of Engineering.

Good luck!!