Do I have to be a resident to go to a park in Orlando??

Not in any way, it is free to visit. If the purchase is online there is a discount up to 30o / o

No

Not at all. Tourists, residents, citizens. Everyone can go

resident of the United States? or a resident of Florida? If you are traveling abroad, you must have a tourist visa, residence, citizenship or any other permit that allows you to enter the country, but if you live in the United States, you do not need it. Now if you are a resident of florida you receive a better discount I suggest you buy the tiket online since you save almost 30%.

No, it is not necessary . Anyone with a passport and authorization to be in the US can go

There's no need