My parents moved to India in a seemingly similar sounding situation. My parents retired at about 50yrs old.
Health care: On par with the U.S., however there appears to be no real "insurance." The more money one has, the better care one can afford. My dad had bypass surgery last year. Cost in the U.S.: $15k-$35k. Cost in India: Less than $2000. Same amenities at a very nice hospital.
In contrast, before Obamacare, he was paying about $2000 a MONTH for health insurance for himself and my mom (he has had cancer twice).
Education: Any decent school will most likely be English-speaking. Is this for yourself or children? Indian schools are more rigorous than their American counterparts, IMO. Same as healthcare, the more money you have the better off you are.
Everything else: Assuming you are in a major metropolitan city, you should be able to find the same things you find here (for example, pasta, or pancakes). One thing my parents seem to have trouble finding are lamps (like, table lamps), which seem to be nonexistent in India. (Most lighting is hardwired into the wall or ceiling, for anyone curious).
Cost of living in India is significantly cheaper than the U.S. (duh). However, the system in place is one that the poor, or those that want to be "cheap," don't really thrive. If you have money and are willing to spend money, you should be fine.