To all you sewing lot...

Oooh nice, from a Pfaff domestic.
As @pdlouche says

• top one is a binding foot. A roll of bias binding threads in/out of the two uprights on far right, then into the funnel, folding over to be stitched onto a fabric edge
  
• two down is for zig-zag stitch; the box section allows needle to move left/right, whilst still pulling the fabric through, and also handy for other things - you can position the Pfaff needle to either far left or right, and use to edge stitch, zips, hem
  
• three down, I have no idea! Looks intriguing; maybe something for piping/feeding in another thread
  
• forth down looks like a regular foot, but offset, for accurate edge
  stitching. You will need to set the needle to the right, into the
  slot space, to use this
  
  

The attachment is specific for Pfaff domestic - if you should ever like to sell any on, please let me know :)