Both the names Johnny Weismuller and Esther Williams were brand names of pools sold here in MD by a company called Namco and manufactured (I think) by Delair. Namco is located throughout the Northeast. If there is a Namco locally they might have some info for you. But be forewarned, Namco is the WalMart of the pool world, so don't go in expecting much. That way they won't let you down.
As long as the pool is in good shape, it sounds like you got a decent deal. If the liner is good, I would try to reuse it. If there is any doubt though, I would put an overlap on it since water can get expensive to replace multiple times. From where I'm sitting, it looks like a good cleaning and replacement of some commonly available parts will get you in business.
The following is quoted from a website describing how awful Johnny W pools are. Please take it with a grain of salt as it appears to be one or two disgruntled owners. I post it because it gives some history for your pool purchase. The past two years, these pools have been all aluminum. Since your pool is older, it is conceivable that it was made of steel.
The following quote comes from the website
http://johnnyweissmullerpoolssuck.com/
Delair Group, LLC was founded more than 40 years ago as the Esther Williams Swimming Pool Company. Today, Delair is one of the leading pool and fence manufacturers in the world.
Delair manufactures products under the following brand names: Delgard Premier Aluminum Fencing, Infinity, Esther Williams, Johnny Weissmuller and Symphony Series.
Whether you're looking for a custom inground pool, a value-priced above ground pool, or a strong, durable fence for your home or business, Delair is your trusted source for a broad range of pools and fences.
This was a statement directly from Delgard's website: "Johnny Weissmuller pools are high quality, reliable pools that bear the tradition of excellence of their legendary namesake."
This is the company that sells the Johnny Weissmuller brand pools in the Northeast: Namco. Other resellers will be listed that sell JW brand pools. Delair has removed all reference to JW pools from their website.