Some good coins, I think you "may" have some silver there. Also some bronze Roman coins. I think the gold Roman is a replica, it has that look I've talked about... That helmet is insanely interesting, if not a replica its worth a fortune and belongs in a museum. It needs checked out by a museum or an expert of some type. Cool stuff !!
Hard to tell, could be a half sovereign, but the British coin should be a sovereign and have almost a quarter ounce of gold. Value probably isn't a whole lot over melt. The Albania 100 Franga Ar has a actual gold weight of .9335, a mintage of 5000, and I would guess (my book is several years out of date) the value at 2 to 3 times melt. Have no idea on any of the rest of it.