Toy Story was not actually rendered on this computer. It was used for X-Rays mostly, and also for weather modeling. A juggling clown animation was made on this computer to demonstrate the machine. Steve Jobs decided to turn the company into an animation studio, recognizing the talent of the engineers.
More content coming soon...
For now, see Pixar Image Computer on Wikipedia.
The Wikipedia picture is not very good, except that it is touted to represent "Pixar's own Pixar Image Computer", so it kind of wins