It looks like you are missing the hollow top and bottom metal plates for that harmonica. On the metal plate they are usually stamped with the brand and key of harmonica which is why its hard to find information about that one. Check out chromatic, tremelo, and octave harmonica tunings to see which yours is. You may need a tuner to identify what notes the individual reeds make. You could also fashion together a metal plate with an opening away from the reed holes to make it more comfortable to play.

It's missing the cover plates, so I doubt it's really playable.

What kind of music would you like to play? If you want something that can do bends, you should look into the Hohner Blues Band harmonica: they run about $10 in the States and are a good option for a beginner.

Note that harmonicas are diatonic*, and you'll need them in multiple keys if you want to play with others. You can buy them in sets or mix different ones to see what you like.

It's a fun instrument to just noodle around on and pick out tunes. Get familiar with the feel of it, then look for videos or books to go deeper.

*There are actually different scales that you can play on a standard diatonic harmonica if you play cross harp. This is what you'll need to look at if you want to play the blues.