The easier way, get off at the Disney Way exit, and turn right (west), towards Disneyland.
At Harbor (just before the big Disneyland sign), make a left onto Harbor (South), go to Convention Way, and then make a left into the Toy Story Lot, and where the Toll booths area.
I placed a marked map earlier, just click on it to see the Marked Satellite map.
http://www.gmap-pedometer.com/?r=6983604