u/Jester21actual

unfortunately my uncle passed away recently. something he left behind for me was his bike. im taking in the condition it is now. he must of been in the middle of working on it during his passing. i searched high and low all over his house and no luck finding any parts for it. my concern is the area where the pedals go. i dont even know where to begin as i have no experience with these bikes. pictured is everything have for it. any advice and help is greatly appreciated!