Hi wilb67......welcome to TFF.
Your IJ revolver appears to be the "Safety Automaatic Double Action (aka Old Model Safety Hammer Auto Revolver). This revolver was manufactured between 1893 and 1950.
I've got some bad news.....and some good news.
First the bad news......it isn't worth much. Even in good working condition, value is probably in the $50 to $80 range.
The good news is.....if
you can find somebody to repair it, parts are
available at GunPartsCorp: http://www.e-gunparts.com/productsch...UTO%20REVOLVER
If this is "just another gun", it probably isn't worth repairing.....use it as a paperweight. If was "grandpa's gun" and has been passed down thru the family, it might be worth taking to a gunsmith and seeing what he'd charge to repair it.
BTW....."Barrel will not turn when trigger is pulled".....I think you mean the cylinder. The barrel isn't supposed to turn, the cylinder is.