The color wheel above shows where to paint the colors on the color wheel. Red, yellow, and blue are your primary colors, and orange, green and violet are your secondaries. Complimentary colors are directly across from each other.
On the left there are my recommendations of which Professional or Cotman (student) Paints I would purchase first, second, and third if you are on a budget.
The color palette is for you to print and color in with your paints like they are laid out in your palette so that you can easily reference what the colors look like on paper.