they are only called "rotary" when it's a set for a rotary machine. The only difference between rotary and vs are the shirr plate and underbraider, the rest are the same. The set shown is for a VS machine, becuase it's got teh slide shirr plate, but everything but that part would fit a rotary machine too.
The tucker has been taken apart, and the hemstitcher is a separate attachment that will work on most machines. The small rectangular piece in the lower right corner is part of the hemstitcher attachment - That goes over the top and a screw goes in the slot and into the hole on the bed of the machine.
The long piece with the circle cut out in the middle is for mounting a light fixture into an electrical box - always interesting seeing what gets put in with sewing machine attachments!
Most of the other "weird" looking pieces are parts of the tucker, not sure if it's all there though.