First welcome to the ‘Bolt. Your link didn’t give me permission to look at your photos.
You’re in a great forum to start working on your Dad’s truck and you will get the help you need.
Your brake issue is the first thing you should tackle and you should start a thread in the Driveline forum to get the best help. Judging by the pedals preset position on the floor, the spring holding it up may be disconnected, broke or missing.
Let me give you this
helpful guide to help you navigate thru the different forums on Stovebolt.
