2004 Chryser Dodge Durango SLT. Throttle Cable Recall

Rust at -passenger corner of rear tailgate door in about 6 inches almost gone and rust above license plate. 
Drivers side rear panel below gas cap 4 inch area rusted through. 
Spots quarter sized on hood surface rust. I just bought the car used at auction; I am a dealer. 

After adding fuel injector cleaner to full tank of gas and went on
highway WOT. The throttle stuck at WOT and when I put