We need less grainy pics. Would also need pics of #2 pics back, it looks more like a brooch to me. #3 appears to be a broken off skeleton key or a clock winding key.
The coin-looking item - I would guess it was a homemade charm for a bracelet, maybe around the birth of a child. Was popular to do back them. Could have been made from a simple coin or any number of tokens that were available back then. Not really enough left of it to know what it used to be. On the other hand, there are some really talented folks here that MIGHT just figure it out!!