I applaud your decision to restore this machine. OMB Warehouse sells the foot peg rubbers. Their link is at the top of the page and they are our benefactors who run the forum here.
Here is a link to the Briggs L Head engine manuals on line. Click Here
Here is a link to @Dr. Shop Teacher write up on rebuilding 3HP Briggs with some excellent details. Click Here
Your flow jet carburetor most likely needs some attention. You can find new one's on ebay right now for less than $25. Not even worth rebuilding at that price, since someone has probably already tried to split it apart without removing the main metering needle.
There are some things I'd check before putting on that recoil/shroud. I'll let the experts chime in, but pawls, flywheel off, points, mag, (magnetron conversion?)
Also, and I am not sure of your model, but many of the Tote Gotes did not utilize the engine governor. If it is removed, it might be because it came that way originally, to make a simpler linkage- and the load was generally sufficient enough to where you had to try very hard to blow them up.
Those levers look like mini bike standard Cherry. Inexpensive to replace. Excited to see you move ahead on this.