It depends on where you are. In the U.S. only a few states require registration and there is no federal registration.
No.
yes it does. :)
Who made it? Is it a rifle, shotgun or handgun?
No, it does not.
Where are you? Most U.S. states do not require registration.
1897
The P9R is made in Hungary by the FEGARMY Arms factory
See link.
Could be a rifle, shotgun or handgun.
No sn provided.
In 1897 the Winchester Model 1894 will serial number 76,465 to 111,453 were manufactured. 93431 is halfway in between those numbers, so it can be assumed that it was manufactured in June or July of 1897.
Your winchester model 1897 pump shotgun was made early on in 1900.