Goal and options: Cut the front and back base panels.
output answer: Use 1 x 6 lumber and cut two pieces to the width that you cut your bottom panel. Skip this step if making wall if fastening to the wall.

Goal and options: vise
output answer: have handles to turn securely

Goal and options: How do I carve the face of a pumpkin?
output answer:
After removing the seeds, slice into the pumpkin's face with a knife and make designs desired (or trace designs first with marker & then cut into those).