Hey Sonali,
There are several options you can pursue for After your MBBS, as everyone knows there is no importance of MBBS without PG, I am here mentioning some of the options :

• You can go for MS/MD degree programmes which are of three year. You can do specialization in any field in this. You have to appear for NEET PG entrance exam for admission to this. Some Colleges for going through this course are AIIMS, JIPMER, PGI, CMC, St. John's Medical College of Banglore.
• You can go for Post graduation in Hospital management /administration in Appolo college, Symbiosis Centre of Health care, Tata Institute of Social Sciences.
• One can also pursue MBA degree after MBBS, for it you have to appear for Management entrance exams like CAT/XAT /CMAT /MAT, etc.

And as you have asked for Fee, it is based on the college you are choosing and the ranking you get in entrance exam and the course you are choosing.
Good Luck!