Hey. The SNES controller seems as though all the buttons are "press-able" but only one button responds to the inputs. I've had this controller since the 90's. I believe an old dog I used to own chewed on it, which is why it looks like it does today.
Wow, those look pretty rough. The controller can easily be fixed, as long as nothing is damaged inside.
The N64, no idea what that screw is actually doing there. What happens when you remove the screw?
The RF switch is junk, toss it. It's easily fixed, but really not worth it IMO. It would probably cost you more to ship it to me, have me fix it, and then pay for shipping back than it's worth. If you wanna try and fix it yourself, I can post a parts list, but like I said, it's not worth it. You can grab another used one for a few bucks, tops.
I tried testing out the Nintendo 64 without the screw and the reset button works! Problem now is the hole from the screw. Haha. Also, I forgot to mention that the N64 has some cosmetic damage to the outside casing. The damaged area is covered in tape. I bought this system because it came with an Expansion Pak and I needed it for my other N64.
I'm gonna go ahead and give you the RF switch. You can use it for spare parts or whatever.