Avaialble from gunpartscorp through their website. They are in stock, $25.35 plus shipping.
Online (Gun Broker, Auction Arms, Guns America), might find some at gun shops, gun shows.
It doesn't exist. Now a RUGER, Mark 1 you can get a manual for from the company website.
A good start would be to read the owner's manual. If you do not have the owner's manual, go the the link below marked RAMLINE. It will take you to an on-line owner's manual for the Exactor pistol. Print and keep a copy.
$50ish used if it works. They are not highly regarded.
The one that came with it
Request a manual from Ruger's website or take it to a gunsmith
.9 miles, give or take.
22 pistols usually take 22 shorts and all starter pistols take blanks.
A 22 caliber pistol holds a dose of 22 caliber ammo.
Request a manual from Ruger's website or take it to a gunsmith
Best left to a gunsmith