Rust problem 74 Duster

Hey, so I've known about some rust on my Duster for a while but haven't had the opportunity to dig into it. It is mainly located in the floor plans, kick panel, and random spots around the body. I was wondering if this rust is too much to fix when weighed against the value of the vehicle. Open to all suggestions. I am not familiar at all with body work.
Thanks, Mike

IMG_20160521_201533763.jpg

IMG_20160521_201439515.jpg

12345.JPG

123456.JPG