My first recommendation would be to get rid of all of it since you can't verify the history of the equipment. If you are determined to salvage some of it you can torch the inside of the boxes and lids and use them again. I would be really weary about reusing the frames. With the bee yard going so long without attention, as the hives died off there would have been a lot of robbing. The hive with AFB could have been heavily robbed and spread disease to the other hives.