Not if you're using it as the authority to pilot the plane.
yes
Yes.
passport, drivers licence, proof of age, birth certificate but usually photo id is required
No. You need a passport.
Yes, even for that size aircraft.
No. To fly an airplane you need a pilot's license. To fly on an airplane within the USA, NTSA guidelines require a passport (foreign or US), US passport card, or US drivers license or non-drivers license.
Yes, you need a license to fly any plane in any state in the US. California is no exception. You can find in-depth information at www.californiaaviation.com
No.
no, it is a card.You need either strong arms or a plane. he heAns 2 - Assuming you also have a credit card and both are in date, then you are OK in most airports.
You buy it or build it. No different than owning a car. You DO need a license to FLY it.
No, picture ID such as a drivers license would be sufficient if you are a UK CITIZEN.