Oh, sorry, forgot about question 2.
For brands of paint, I have:
WalMart's brand of automotive primer, medium gray, light gray and rust red, for priming
Schminke-Mussini oils, which I bought for painting figures in connoisseur style, like the Germans do, but which I use more for making washes for models
Testor's gloss enamels in the little square bottles. Some dry out almost as soon as they're opened (eg, gloss white or black), others have lasted me years (eg, a bottle of gloss copper has lasted me over 30 years, a bottle of red nearly 10)
Tamiya gloss and matte acrylics and enamels, for everything
Model Master gloss and matte acrylics and enamels (I think they make both, can't remember for sure now), for everything
Some Vallejo and Andrea acrylics, which I use mainly for washes
Craft-store acrylics, for everything. At 88 cents a bottle or less on sale, you can't beat the price
Tamiya and Model Master rattle can colors, for everything. I like Tamiya's line of colors specifically for airplane models.
Also, some old Pactra water-based enamels, which were the best and easiest to use that I ever had. The bottles I have are over 30 years old and still good. Sadly, Testor bought out Pactra, and the lines soon disappeared.
One or two Gunze-Sangyo paints, water-based enamels, which I picked up here and there.
Since I don't mix my own colors that much, I tend to buy a bottle of paint because I need the color, so I wind up with a lot of brands. The only reason I don't have any Humbrol is that none of my LHS ever carried it. And Polly-S paints were usually in the model railroad section.
For brushes, get yourself some good natural fiber brushes, sable, for example. Take care of them and they will last forever, so any high cost up front will be recouped over time. Go to an artist's supply store, if your LHS doesn't have good brushes, or the painting aisle at Michael's or AC Moore, or HobbyLobby, if there's one near you (sorry, are you in the US or Canada? My references won't be valid elsewhere). Use them, clean them (I dip mine in a thinner and drag the brush gently across a rag or piece of paper towling, pulling in the direction of the handle, until clean) and store them upright to preserve the tips. I used to use an old piece of 2x4 with holes drilled in it, but now I use a ceramic toothbrush caddy meant for use in the bathroom.
Hope that helps!
Brad