A revolver is louder than a pistol due to the barrel-cylinder gap that is located between the cylinder face and forcing cone of a revolver.
Smith&Wesson model 14
About $400.
@ 53
Smith and Wesson Chief's Special Model CS45
Impossible to answer without a detailed description.
100-1000 depending on EXACTLY what you have.
74-75
1968
1977
Recommend you find a good gunsmith.
1946-1948.
The worth is $539