Try here:http://www.google.com/intl/en/landing/tr��For maps and schedules for LAhttp://www.metro.net/For Orange county maps and scheduleshttp://www.octa.net/
where in the valley are you starting where in orange county are you goin?what time are you leaviung? what time do you do have to be there?it depends where yiou are starting fromalthough if you are in north hollywoodyou could take the red line to downtown then 460 into orange countyit services Bunea park (knotts) Fullerton and Disneyland..
Depends where in OC you want to go. You can take the Orange Line from the Valley to downtown LA, and then OCTA bus 701 or 721, or the Amtrak train, to OC.