Do you have to pay for parking ?

Yes you have to and it's a bit expensive; I'd recommend using Uber or Lyft if you don't have any other plans except skydeck.

Try the spot hero app for cheaper parking

I parked on the street if you take the cheeper tour of the skydeck it will take you about 2 and 1/2 hours to get back to your car so pay for that much time or more still had to walk 4 blocks great time up there you'll enjoy it

Yes, please check for availability of parking from lots, online too

Yes, but we took the train and walked from there. It was pretty easy.

Yes..check nearby parking through iParkit..it is around $10-15 for 2 hours.

Yes

Yes but it was responsible for the area.

Yes, the cheapest way is to use an parking app like Spot Hero

Yes, there's some parking lots near the building but you have to pay, how much you will pay? it depends on the day.