Many volunteer stations are staffed by career firefighters and EMT/Paramedics.
Volunteer stations can be funded in many ways....by city, county, donation, fundraisers, etc. Most are understaffed, and many are occupied by volunteers with marginal experience. Obviously, this is not always the case....as many are also run by experienced, professional volunteers.
There are also different types of "volunteers". Paid-on call, Paid volunteers, and true volunteers.
I was on the board of directors for my volunteer station....ours was county funded to a point, as it was a collection of career and volunteer firefighters, but the politics came into play and the volunteers often found ourselves funding our own training, gear, etc. Mostly through donations and local fundraising....it helps to be very active in public fire education, so the community knows you're not just there to play with sirens.
I realize that this post is a mess....but in my defense, many times volunteer stations are equally confusing. I'm tired too.