no
No.
No
No
Depends on where you are. In MOST of the US, there is no requirement to register an ordinary firearm. There is also no place to register a gun- on line or otherwise.
Like MOST states in the US, Wisconsin has NO requirements to register ordinary rifles, shotguns, or handguns. When you purchase a firearm from a dealer, the dealer retains a record of the sale at his premises. But there is no central registry of firearms.
Not to own a gun. Only to carry it concealed.
Depends on where you are. In most of the US, there IS no registration of firearms.
Go to your local police station.
about 600 dollars.
Wisconsin does not require a permit to purchase or to own a firearm. It does require a permit to carry a firearm concealed on your person. When you apply, the permit will be granted or denied within 21 days by State law.
Start by consulting a Wisconsin attorney that knows firearms law and procedures in that state. You WILL need an attorney.