Blue Book of Gun Values can assist you.
10-1000 USD depending on specifics
It should be marked on the barrel.
What is the caliber, barrel length, finish, grip material, markings on barrel?
On the top of the barrel near the flash suppressor it should be stamped with the caliber and rate of rifling. Example - 5.56 Nato 1/7.
a slug is normally use in a shot gun and they are not rifled a gun with a rifled barrel should shoot a Shell that is the same caliber as the gun.
100 USD
100-425 USD
Need to know caliber, barrel length, and type of action.
75-1000 depending on specifics
The "rate of twist on rifling" is caliber specific. To give you an answer we would need to know which cartridge the rifle is chambered for.
The gun is chambered for the 32 caliber Winchester center fire cartridge. Also known as the 32-20.
You will have to provide a caliber, type of action and barrel length along with overall condition.