Every cartoonist has a different setup to their studio. The important thing to remember is your studio should be comfortable. Have a clean drawing surface, a comfortable chair, and your supplies. It helps to have a place to store your drawings and unused sketch pads.
Here are some examples of professional cartoonist’s studio setup. You can click on the image to view the larger.
Jan Marc “The Janimal” Quisumbing’s Studio
Roger Phillips Studio