What is your problem exactly? You don't know how to get it off, or things are jammed and not coming off like they are supposed too?
The first picture is of your stem mounted friction shifters. To remove those there should be a screw facing the rear wheel, unscrew that all the way to totally loosen them... but I am almost positive you will need to remove the stem to actually get them off.
The stem looks like a quill stem. To remove it, loosen the bolt on top a little bit then hit the bolt with a hammer, knocking it back down. Then you can pull the stem out.
The front deraillure is a clamp on type. You just have to unscrew the bolt that is furthest from the camera in the picture to take it off the bike. There is a little screw where the chain is resting on the deraillure. Unscrew that all the way and you can remove that little bar so the deraillure will slip off the chain.