Depends on the law where you are. In most of the US, no requirement for registration of ordinary rifles, shotgun and handguns.
Since they are not registered, there is no way to answer your question. In the US, MOST guns are not registered- there is no law requiring that guns be registered. It is a popular misconception that there IS such a requirement, but there is none on a Federal level.
http://www.nraila.org/GunLaws/nyc.aspx
No
No.
Like most of the US, there is no registration of guns in Texas.
No- see link below.
No, but gun owners do.
You cant'.
University
Many places don't require it.
In most U.S. states, there is no registration.
You will need experience as a CNA or a LPN before you can become a Registered Nurse. After getting the experience, you will need to pass the program.