To me, the two smaller ones look OK. I would follow the advice above and see how they hold. If they are not salvageable, you could always take them apart and have tons of prime Hungarian oak to add to your carboys.
IMHO, the big one should not be used for wine, it should be a planter, votive holder, wine rack, wine flight, etc.
Also, one of the photos appears to have a nail in the end. Get a spile, remove the nail and fill that sucker up.
Also, those are whiskey barrels and probably have a char inside instead of a toast.