1. The missing fuse and holder terminal is for a spot light. That's why it says "SPOT LP". It's common for that to be "missing" if not RPOrdered. Your tail light/stop-dome fuse is in place.
2. If you want to know how to hook up the turn signal wires, advise the colors coming out of the switch.
3. The neutral safety switch wires (violet) look like someone was bypassing the switch. One vio wire from the switch goes to the solenoid via the 6 pin firewall connector on driver side. The other vio wire goes to the ignition switch solenoid terminal. Switch is probably bad. That's why the bypass.
Does the truck start?
You only have one other issue, that was almost 2 years ago. (454 swap)