Hi Rahul,

It depends on which college you are studying. Some colleges do allow this change and some colleges don't. For colleges which allows change of college under the same University, follows some criteria, which varies from college to college. As far as I know the first criteria is the marks or cgpa of your first year should be 9 or above, you should bring a NOC from your parents and you should have proper reasons for "why do you want to change the college?", otherwise the college authorities usually don't allow you to change because they also do want any customer to go away, every one is in business. 

And about the fees, if you change your college, you will have to pay the new fees of the college you are going to.

Hopefully this helps.