To me there are two separate considerations here. One is getting into photography. The other is using gear that is inherited because it is inherited.
If it is only taking up photography, then just using a camera at hand such as a smartphone is an entry point...though smartphone photography has tradeoffs relative to dedicated camera equipment. Buying contemporary new or camera and lens is one way to go.
If it is using particular equipment due to the history of that equipment it all depends on the particular individual. Here, if the camera works (they often do), then all that is needed to take up photography is a roll of film. It may be available locally through a camera shop and certainly available via the internet. Film processing can also be done using the mail.
Actually, there is a third option. Take up digital photography to get started and keep the film equipment around in case it seems like fun to shoot film. Fun is the goal of hobbies.