Do some googling on "seeburg jukebox" - you'll find that there's many collectors out there with the tech experience you seek to do something with the box; likely you are going to want to interface it with some kind of microcontroller, then use that to communicate with whatever device strikes your fancy. My only other advice would be to take care if you do any restoration work on it; I am not sure what such a device is worth on the antique market, but I do know that if you do the wrong thing, you can destroy value instantly like nobody's business. Your first order of business will probably be to clean it up and make sure that it works like it is supposed to. This may not be an easy thing to do, depending on whether you can find a knowledgeable collector of Seeburg jukeboxes that would let you hook it up (and/or could troubleshoot issues with it). You want to know that it works, so you can then interface with it (otherwise you'll be left guessing whether the issue if the selector, your interface, your code, or anything else). Good luck.