Well, short answer, in most U.S. states, you don't have to if it's a person to person sale. You can, if you choose to, go to a gun store and ask them to process the transaction, but I'm sure most places will charge you to do that.
No public domain information available.
In the US, roughly 1/3 of the households are gun owners.
You can find much good information online about guns on Youtube but you may also talk to gun store owners, gun owners, go to gun shows, or go to a shooting range and ask questions. Im sure the Colt website has a plethora of information on their firearms with exact specifications of each gun and every detail and they probably also mail out information and catalogs for free if you request it.
No. There is no registration of gun owners
Gun owners aren't "registered" like cars. One estimate is that there are @ 4 million or so gun owners.
Roughly 1.4 million LEGAL gun owners.
MOST states do not register guns or gun owners.
Such information is typically not made available to the general public, nor should it be.
Impossible to answer. There is no registration of gun owners in the US, so no records for the information you ask for. Best estimate is several million.
NO.. Only people with felonies may not own or be in possession of firearms.
Since, like most states, Utah does not require registration of guns or gun owners, there is no one source of reliable information on the number of gun owners in Utah. However, some studies indicate that nearly half of the households in Utah own at least one firearm.
Depends on which gun you are buying, but in general, yes, it is. Contact the New Jersey State Police for additional information. This is a fairly complex process and takes several months to complete.