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.
Go to your local police station.
Depends on where you are. In most of the US, there IS no registration of firearms.
Not to own a gun. Only to carry it concealed.
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.
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.