I’m not 100% sure but I’m pretty sure Finale doesn’t and with that knowledge, I doubt MuseScore does either. They’re score writing programmes rather than music production programmes like Cubase, so the influence is very much on you to write your own music rather than put bits of music together to create a track, and therefore its less necessary to have samples.
That said, I know Sibelius 7 has a samples library and it’s a score writing software. However I don’t think Sibelius 7 First, the less full and thus cheaper version has it, so I’m doubtful free software would have them. I dunno.
It’s not too difficult to just write some small motifs anyway, loop it, then throw it in with a bunch of different instruments. Not much musical knowledge is required to make a basic track (or really any at all).