Hawaii questions ! :3?

1. Oahu, Waikiki 2. Yes like Sydney, New York or Paris, 3. Hiking, site seeing many attractions, the Palace, volcanoes, Pearl Harbor, Luau. 4. Nice but it can be rainy, 70 - 85 degrees F. 5. Depends on where you buy most large stores, prices are same as US mainland. 6. Oahu. 7. You will want to rent a car, big Island can not walk it, but if your in Waikiki rent only for the days you need it otherwise take the bus.