Pencils. 2H, HB, and 2B at least. A wider range is always better, but these three are the minimum you'd need.
Eraser
Colored art markers (Prismacolor and Copic are fantastic, but also costly and not at all required)
            A few colors will be necessary, but nobody needs to get a gigantic set of colors if they don’t want to.
Greyscale set of art markers
Sketch pad; 9" x 12" or larger
White gel pen
White and black colored pencils
A black pen (marker pen is great, but not mandatory)

Dungeons and Dragons does contain some levels of violence. We will not be drawing actual combat violence; however, there are many characters that have weapons as part of their design, and we will be drawing things such as swords, axes, and other fantasy weaponry.