
I suggest looking at;
http://www.everythingairbrush.com/
Theyre
UK based for a start

(judging by your flag.. which isnt always right hehe)
They carry quite a selection of airbrushes... finespray are their cheaper brand, and theyre not bad brushes. Prices from £30ish upwards
They also stock badger and Harder & Steenbeck which are both fine companies (I'm partial to H&S) Prices from about £70 ish upwards
Compressor; youl want something like this;
http://www.everythingairbrush.com/acatalog/info_AB_AS_186.html
Which is an AS186 compressor that runs about £85 at that shop. Its a very common design of compressor that many of us use, Ive got the next one up and its been going years.
Paints... Vallejo Model Air, standard

hehe seriously theyre great paints, vallejo airbrush thinners work very well with all the citadel colours I've tried so far too.
You'l also want a cleaning station / stand like this;
http://www.everythingairbrush.com/acatalog/info_aBA_0257.html
Some cleaner, be it windex, store bought airbrush cleaner, isopropyl alcohol or whatever works for you.
Some disposable shot glasses for mixing paints in.
A sacrificial paint brush for cleaning the thing out with (itle last but will be otherwise wrecked before long)
Lots of patience, and some research

I'm sure your on it already but youtube is a great resource for learning some of this stuff. Don't just look at mini painters using airbrushes,theres some amazing painters doing canvas, tshirts, cars/motorcycles, walls, non wargaming models, body art... etc airbrushes are used in lots of areas - wargaming is quite slow to catch onto things really.