I have used the Badger paints and can bring some for people to try. Personally I do not care for them, there is an element of vinyl to them (if that makes sense) that I do not enjoy. That being said they go through the airbrush nice...but with proper mixing, any paint will go through an airbrush.
Yes, bring your own paints, models, brushes and so on, if you intend to paint. I will have a selection of things I am working on that I can show demos on.
As for which primer it will really depends on the color going over it and what you're looking to achieve with the basecoat.