How much would it cost to change a 1995 Civic Hatchback from a stick to an automatic?

More than the car is worth, depending on how you are getting the new transmission, if you are doing the work yourself or paying someone to do it and if you have an electronic engine, which I am sure you do, in a 95 model auto. Th ECM (engine computer) would have to be reprogrammed, or more likely, replaced, to accept the shift parameters required for an auto transmission. My advice is to trade the whole car for something with auto trans, if you are unhappy with the standard shift transmission.