Once you've gone int, you have to walk underneath the train station.
Under there are loads of maps and schedules.
But if like me you get waaay to excited and rush to main st. Then the people at the information boards (theres one in central plaza near plaza gardens) also give out maps and schedules.
You get the park schedules and park maps when you check into your onsite hotel.
You can also get both in each park - main park and Studios, just after you go through the entrance turnstiles.