If the first is genuine (I can't tell without a lot of Photoshopping), it's probably Diocletian or one of the many short-lived emperors of the mid-late 3rd century A.D. As far as value is concerned, even if it is genuine, probably not worth a fortune as this type of coin is turned up quite regularly by metal detectorists. The second is definitely a gaming token and I would tend to agree with John (argentumandcoins) re the third. It actually says POSTVUMVS on the obverse side of that coin - Gotta have good eyes