India

Yes you have high chances.Check placement and international collaboration details here.
https://www.shiksha.com/getListingDetail/31040/institute/college-Vit-Business-School-Vellore-Vitbs-Vellore-India

Check out the link :
https://www.shiksha.com/top-computer-science-engineering-colleges-in-tamil-nadu-rankingpage-46-0-123-0-0

Yes there is.you need to get quite a good rank for admission into top5 institutes.
Check ipu.ac.in for exact eligibility criteria

both you can get educational loan . for Abroad studies you might have to give some immovable property as security

Hi Anjali, MCAT is the primary exam you need to take to obtain entry into Harvard Medical School or any medical school in USA. You must also take the TOEFL. Please go through the page below, will help you understand the process better. Harvard is one of the toughest to get into so you must have met all the requirements it states.
http://hms.harvard.edu/departments/medical-education
All the best.