Always depends on condition! First ones made had round barrels(1887), later ones had flats. Some had a loading gate, most did not. The loading gate model cost extra. I've paid anywhere from $50 for one in fair condition to $250 for one in excellent condition still in the box.
Caliber should be on the barrel. SN's were not required until 1968
No such weapon made by S&W
10-100 USD or so
A large revolver
Probably late 1880's
I did my research on the gun itself and it is .32 caliber. Its worth about $1,750. for more info e-mail me at t7k7t7@aol.com
An Iver Johnson revolver in 32 caliber was used to assassinate President McKinley. 2 shots were fired, one hitting his breastbone did not penetrate, the second shot entered lower and damaged a number or organs. The bullet was not removed.
Yes, you can shoot .38 caliber ammunition in a .357 revolver because the .357 revolver is designed to also shoot .38 caliber ammunition.
Blue Book of Gun Values
No way to answer without detailed information on all markings and features.
Anywhere from $10-$200, depending on condition, model, etc.
1910