Dear aspirant

MBBS first year have mainly three subject to study these are

anatomy

physiology

biochemistry

As you haven't specified any publication so we can't tell the actual cost price of the books. Also different publication and different writers have different cost.

If you buy new set of first year MBBS course then it might cost between 7-10k for all the books including all the three subject.

First you should decide which writers books you want to read then you can search price on online platform like Amazon. Also different shop's will give different discount so price will vary. But it will in between 7k-10k for new set of mbbs first year books of any publication.

Hope this information helps you

All the best