Ok, the weird presser feet are for invisible zippers:
https://www.ebay.com/itm/172205584037
Now for the last one. And I'm going to need your help on this one. I took a picture of this little metal case so you could see the size against my computer mouse. The inside has a cardboard liner with red velvet on the inside. The red liner in the lid has two slits. What is is for? A tiny pair of scissors that didn't come with it?