JP - The town I grew up in had a pop of about 900 during that time. The town grew a little through the years, but when I left after high school, the FD was pretty much the same as it was in the fifties.
The FD was all volunteer - no one was paid. The chief was elected by the group. Usually a local business proprietor who could get to the station in a hurry and get the first truck rolling.
They had 2 trucks - I think they were called pumpers because they only carried a small reservoir of water on board and were forced to connect to a fire hydrant to fight a fire. If it was out in the country, they used what they had and returned to town for a refill, or they could pump from a stock pond if one was nearby.
When there was a fire, a siren mounted on the highest rung of the water tower sounded and everyone in hearing distance gathered at the station and off they went. They conducted a training session about once a month and those who attended put the letter 'P' (for present) next to their name on a big board. It was a standing joke about who 'peed' on the board.
Most calls were grass fires and with the help of the community they usually put it out before it got out of hand. If it was a house, kiss it goodbye. If it was a building, they called for help from the nearest town. It usually burned to the ground. Other than being moderately mechanized, the entire operation was not a lot different than the way fire was fought at the turn of the century. Of course if you were lucky, you could ride on the firetruck during the annual 4th of July parade.