How bad does this look?

I've recently acquired a 1976 Scamp and it has a little bit of a rust problem. I've finally done the job of getting the whole instrument cluster working again, and now I think it may be time to deal with the rust on it. I took some pictures of all of the really bad areas and I'm wondering what I'm in for. A friend of mine said he would help me fix it, but I'm thinking if it's too much money wise to cut and weld, I may just cut it out myself, bondo it, and paint it with a rattle can. How bad do you guys think this is? Keep in mind, this car has been parked under a big oak tree for the last 13 years and it will soon be kept in an apartment parking lot.