The danger of toxic pigments ground in oil is vastly over-rated so long as one takes a reasonable precaution not to eat any paint and to wash carefully after a session.
Airbrushing, however, does present some substantial dangers, for the aerosols can be quite dangerous, both in terms of pigment and vehicle. If you plan to use any sort of spray system, it would be well to wear a quality respirator mask and also some eye protection.
For many years, I worked as a staff artist in an art studio (gads, what we did in those halcyon days before Gates and Jobs destroyed the business!), and airbrushing was a common procedure, especially in working over product photographs to remove backgrounds, etc. All one had to do was blow one's nose a single time to realize how much airborne pigment is breathed in. Air laden with stuff like lead, cadmium, chrome and other heavy metals is something one might better avoid.
Also the vehicles, themselves, are being broadcast as tiny droplets -- unlike the usual vapor of an open can or brush washer. Again, you have only one liver and a pair of kidneys -- best make them last the entire journey, if you can.