Your two pictures where the tiller is visible, and the final picture, look correct. When you get a driveline attached, it looks like you are ready to start tilling.
I don't recognize pictures 1,2,4. Maybe for some other tractor?? Anybody?
And one more comment - a dealer on here once suggested open and re-grease the off-side tine shaft bearing (picture 3). He said these tillers may have had water in there for years, and spinning a rusted bearing will destroy the end of the tine shaft. Wheel bearing grease. In fact he recommended replace it with a fully sealed bearing then forget it.