England opens at roughly 9:00 (it depends on the day of the week). And parking tills should open about a half hour before. You can always try the park's website or their Facebook page for more direct information.
All of the villages have separate opening times. USUALLY, Everything but Germany (Rhinefield and Octoberfest) open at 10 am with Germany opening at 11 am. Sometimes Italy (Festa and San Marco) open at 10:30 am, but that depends on the day.