B.Tech

Christ university,pes,manipal university,etc

Personal interest should be given utmost importance in branch selection. Other factors count later. So firstly, decide your field of interest. Do some web searches and introspect yourself.
For future prospects, ME is an evergreen branch. You can always get decent jobs there with your skills.
Don't lur

You can seek admission in B.Tech Civil Engineering on completion of 12th board with PCM. Majority of engineering college's admission is through entrance examination. You are advised to appear for various engineering entrance examination such as JEE or State colleges engineering examination. BITSAT e

1) if u miss B.Tech this year, don't stop study, do B.Sc and try for B.Tech. next year. by taking long term coaching
2) if done B.Tech, there is no need Masters
3) doing B.Sc needs MCA later
4) doing B.Tech or MCA or polytechnic diploma only make u engineer
5) if u r interested in computers, do BCA/B.S

by B.Tech lateral entry

JEE Mains or CET score ?

Education doesn't depend on state

It depends on hostel. It maybe in the range of 50k - 55k