Need Help With ID On A Few Possibly Medieval Pieces.

@doom, first welcome to CCF. Second, these overall pic are reasonably good, but a couple things to remember: moving forward please only post one coin per thread. That helps us give each one the attention it deserves. Also, please always include diameter and weight information. Thx.

Yes, please provide size (diameter) and weight if possible.

Good eye on number 1. I think I see a crown, so probably a crowned bust, with not much left of the legend but the last three letters, so maybe + ......... RAC, for (name of ruler) D GRAC. Reverse has cross pattee maybe with something in some of the corners, but I can't tell. And I can't make out anything in the legend which should be REX SICIL or similar if it is from Kingdom of Sicily. There were denari of Charles I with a crowned bust, but it could be hard to match the legends definitively. https://www.acsearch.info/search.html?id=3527393

It looks like the next two photos are of the same side of coin 2?

Coin 3 could possibly be a 17th century Livonian solidus. I think I see SOL at the beginning of the legend. https://en.numista.com/catalogue/pieces42423.html
Real ones are already fairly low quality billon, and the Moldavian counterfeits were closer to pure copper.
There are other coins from this part of the world with legend that started SOLIDVS (Poland-Lithuania for example), but these have a crown at the top, which doesn't seem to be present with yours.
From the link you can see if size is a match.