I believe it is a false economy to try and save money on "student grade" paints. The results are often"chalky" looking because in order to extend the volume clay is added. Recommended  watercolor pallet below --
 2 or 3 yellows, 4 reds, 3 or 4 blues, 1 or 2 greens and if you want 1 black.With the following pallet you should be able to mix any color that you see. Remember this is a  suggestion many substitutes are equally valid and beautiful watercolors have been made with far less
  
Yellows  CADMIUM YELLOW PALE                NEW GAMBOGE
              RAW SIENNA

Reds     BURNT SIENNA   
             CADMIUM SCARLET
             PERMANENT ALIZARIN-                  CRIMSON
             PERMANENT ROSE


Blues   COBALT BLUE
            FRENCH ULTRAMARINE
            WINSOR BLUE  (THALO                    BLUE)


Green  WINSOR GREEN  (THALO               GREEN)

Brushes used in watercolors can be expensive but do not have to be.
 As the years go you will add to them but for starters I recommend at least 1 "round" in  Size 7 to size 9. also a small round in size 5 and in addition you will probably want a brush to make fine lines and there are several options. Some artists like a 1 inch aquarelle. I suggest some simple large natural hair brush for bigger washes.That makes 4 possibly 5 brushes total.
Of course you will need paper to paint on and good paper like Arches will make your job easier.
 I recommend 140 lb cold pressed or rough. Some of the best prices for paint, paper and brushes plus good service is 
Cheap Joe's Art Stuff