Does my friend need to pursue MBBS first to do MD from India? If yes, will the duration for doing MBBS+MD reduce due to his degree?

What is the procedure to be followed & estimated cost like fee? What should he do to get a scholarship? He preferably is looking for AIIMS or some good colleges in Maharashtra. He did Bachelors in genetic engineering & biotechnology from the University of Philadelphia & wants to do MD in India.