Colleges in Coimbatore

Your marks are not too good for CSE. You have slim chances. You can get IT or ECE.

For fee details, I request you to contact the college officials. You can get the contact details from the link mentioned below:
http://www.rvscas.ac.in/contactus.php

Fee structure for MBA varies from college to college and universities will have an altogether different structure. You will have to target colleges and then, accordingly look up for the fees.
Kindly check for websites that provide for the cumulative fees!
I hope this helps.

Yes, you can get admission.

Issue of Application forms
For Under Graduate Courses : 1st week of April
For Post Graduate Courses : 1st week of April
Admissions Closing Date
For Under Graduate Courses : 31st July
For Post Graduate Courses : 15th August