Music

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.