Yes
No
You can get a manual for free at Ruger's website.
Depending on EXACTLY what you have and the conditon, it can range from 75-500 USD. ruger .22 cal single six
22 mag rimfire. say it on the gun.
In .22 cal it's rated at 1000 FPS
50-200 USD
Ruger's website has serial number data on its products.
You need to contact Ruger. You may have a prototype
WMR stands for "Winchester Magnum Rimfire," referring to the .22 WMR cartridge, which is a rimfire cartridge designed for rifles and pistols. It is more powerful than the standard .22 Long Rifle, featuring a larger case and a heavier bullet, making it suitable for small game hunting and varmint control. The .22 WMR is known for its increased velocity and range compared to the .22 LR.
Impossible to answer without more information.
Ruger Single Six
it stands for Winchester Magnum Rifle.....it takes a 22 MAG BULLET