Welcome to the forum!
I second Bish. Get yourself a collection of basic tools and paints, and you'll be fine.
I'd include:
Tools:
- a Nr 11 hobby knife handle and a pack of blades (eg, X-Acto)
- a fine razor saw and handle
- a sprue cutter (you could also get a cuticle cutter at the drugstore, it'd work fine)
- a couple of files in different grades of roughness
- tweezers (again, you could get those at the drugstore)
- some sandpaper, from 80 grit to 400 grit
- some clamps, or even spring clothespins
- rubber bands
Paints:
For armor, I'd get a basic olive drab, a Panzer grey, a dark yellow, and a medium brown, whether in bottles or rattle cans. I use the same OD for tanks as for airplanes, too, because my OD is just a base over which I will apply fading and weathering. Get yourself a black, a white, a red, a blue, a yellow, and a green, too. Oh, and a flesh color. Don't be shy about adding a figure or two.
I don't have any favorite brand or medium. I've got enamels and acrylics, from Tamiya, Model Master, Testor, Andrea, Vallejo, and craft store acrylics. I also have a selection of oils. For thinning or cleaning brushes, I use mineral spirits, with the enamels and oils; water or isopropyl, with the Andrea, Vallejo, and craft store brands; and Tamiya's proprietary acrylic thinner, with the Tamiya acrylics. But if you just start with the basic colors, you'll be well-armed to do what you need to do.
Have a look in the tips & techniques forums here in FineScale, too. Shep Paine was mentioned. His books are very good for modelers starting out to move beyond just building a model, to doing something a little more sophisticated. He intended them to be.
Hope that helps!
Brad