Ok first off paints are important try buying from a few companies except
GW. Popular paint brands are...... Vallejo (get them from thewarstore.com) Reaper paints (The only place I saw them was at miniwargaming.com) and p3 paints (dont know where you can order these just search around on the interwebz)
Second up is brushes I have only a few brushes from
GW, the wash brush and the big tremendous drybrush, then going on to quality products I go to michael's arts and crafts store for acrylic brushes, go to
http://www.kolinskyartbrushes.com/ws_index.html for some extremely high quality brushes that are pretty expensive so I personally have only 2 so far
That should get you pretty much started for now ; )
Happy Wargaming,
Khorne Flakes