in 3d max their is an option of using ink and shade as a render when modeling for a toon texture remember to make the peices show out more they need heavy detail clcik the lefr button to see wireframe and how much detail is in the model i did not use a tutorial on it. Smooth helps and messes up ink and paint play wiht it is my best advise. As for benders head cut open a sphere then drag the bootom vetices out well holding the shift key. make the shapes to cut first using a spline make a spline shape that looks like the mouth then use the cut tool on the main model using the spline as a giude to the shape.

If you still have trouble try some tutorials at www.3dpalace.com they have one on bender but its not the same way i would havemade him good luck.