The tank is good and may have been a real score, regulator is probably ok too (assuming it wasn't stored outside), and tower can be useful depending on what you're looking to do (or ebay that for $25). Take a look at the faucets, they look like chromed brass - they only have a finite lifespan before the chrome is eaten away by the low pH beer. The lines are shot. Picnic faucets can be used but they're only a couple of bucks and you may be able to get more by selling them to some frat boy at a local college if it's a complete set (with the party pump, etc). You won't use the sankey keg couplers in homebrewing.