I am new to GIMP and I do not understand how to change the color of the Pencil tool. The only options I see are:
Where is the option for the color that will be drawn?
At the bottom of the toolbox you see a black and white square. Those are your foreground and background colors. To change them, just click on the square. Also have a look at some Gimp tutorials, as there is certainly plenty of other stuff left to learn: