@OP (and your request to use old tiles), here's a tileset I made a year ago, back when I was really a beginning artist. The tiles are *really* bad (a fun testament to my artistic improvement!), but they are also extensive -- I think there's 200 tiles that support graveyard, desert, grassed and snowy areas, and many dungeon tiles as well. 8x8 in size, scaled up 2x. 4 colors. They were for an old game I was developing pretty singlehandedly (besides the music composition), but since these are well obsolete, use them as needed -- I certainly won't ever be touching them again.
As for some colorized versions: