I have come into hoards of records several times. If you are unfamiliar with the pieces or the composers, you can just play them one by one and decide which ones you like the most. Assuming one disc per sleeve, you have about 40 minutes per disc, which means you can play 2 discs per evening. It will be an amusing project. You should play each one at least once. I am sure that you will find at least one that is really captivating. There is a collection of all 9 Beethoven symphonies at the left on the bottom row. I'd start there, because of the wide variety of music i n that set of symphonies. That set, which will take 4 or 5 hours to play, should have comprehensive notes. In fact, all the records will have liner notes that you can read, which will give information that will Help you pick the ones you want to listen to first. You may find a liner note description that fascinates you and induces you to pick that album first.
Alternatively, you can Google the artists and the record numbers and see if you can find reviews of individual artists. This will tell you the recordings that have good reviews. You can Google the conductors and find Wikipedia articles about them, which will often give discographies that will give info on the recordings. For example, here is a Wikipedia article on Herbert von Karajan, the conductor whose readily recognizable picture appears as the second from left on the top row of albums: https://en.wikipedia.org/wiki/Herbert_von_Karajan
. This one, unfortunately, does not have a discography in the article. However, you can look in Discogs, where most classical performers will be listed by name, with their performances. you can also Google the name with the word "reviews," as, "Herbert von Karajan reviews," and obtain information this way. Here is another example of a review of Karajan's work generally, with mention of particular recordings.http://newyorkarts.net/2008/05/praise-h ... scography/
When I first started collecting records in the a early 1960's, there was only one reference source, and that was the public library. You were restricted to the liner notes, which generally provide accurate historical information filtered through the uncritical acceptance of the note writer. Now, however, with the Internet, you can obtain more incisive reviews.
But anyway, go ahead and play them all. If it really stinks, you can always lay the record aside and play another one.
And good luck from the old record player and review reader,