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
If it is under 50cc you do not need a license in California.
You don't need a degree, you need a license.
no
No you do not.
In the US you must be 16 to solo an airplane with a student pilot's license, and you need to be 17 to be eligible for the private pilot license.
do you need a business license to be a caregiver for the elderly in california?
No you do not.
Typically, operating an airplane is called "flying" and it requires a private pilot license (at minimum) from the FAA. - - - - - It depends on the kind of airplane it is, and what you plan to do with it. The licenses and certificates you need to fly a Piper Cherokee (single-engine piston airplane that isn't pressurized) are far different from what you need to fly a 747.
Yes, you need a business license to sell firewood in California. All people selling items to make money need a business license.
Maybe. Why?
No
17 years old - You need to be at least 17 years old to solo an airplane, and soloing an airplane is a prerequisite to a private pilot's license