It is a .38 S&W Safety Hammerless, Third Model. It was made between 1890 and 1898, probably around 1894, one of 73,500 of that type. It has the uncommon six-inch barrel (most were 3-4"). The caliber is .38 S&W, an older and different cartridge from the .38 Special; ammunition would be readily obtainable, but expensive.
Value in like new condition and that barrel length could go to $500, but in that outside condition and not functioning, $100 or so would be more reasonable, and that would be retail. I doubt a dealer would pay more than $50 if that.
Check
www.gungrip.com/items_22__remington.html for grips (G26).
Some parts are available, but those guns are not easy to repair and few gunsmiths will work on them, since repair costs would exceed the value of the gun.
Jim