The foot in the top photo seems to be a 1/4" seam guide. The lower left one seems be a shirring foot. The fabric would be fed thru the slot and depending on the stitch length would gather the fabric; i.e, the shorter the stitch, a tighter gather and the longer stitch obviously would be looser. The lower right, a stitch-in-the-ditch foot (?). The screw on the top lends to being adjusted.
Just my guesses! I am anxious to see what others think.