It is very easy to propagate. In fact, when I bought my plant at Home Depot, it was a complete disaster. It had fallen down behind a series of wooden shelves they had, a bit like bleachers, and was literally in pieces. (Yes, I still had to pay for it.) I stuck several pieces into soil mix after they had callused over, left them in the shade without any watering, and almost all took root. There seems to be a stage in the plant's life at which it is very tender and breaks easily, but later it is tougher. Anyway, you can cut off any segments, even some with branches on them, and try rooting.

ACK. The bottom one is sorrel. Run far, far away. Run like the devil himself is on your tail. I'm currently INFESTED with it. Called it Devil Weed for years until I found out what it was. I've had all kinds of invasive plants and eradicated them. This stuff is the bane of my gardening existence, it will survive the apocalypse along with the cockroachs. Then it flowers...and you have 10 quadrillion microscopic seeds.

Echeverias especially like a lot of light (that's the first one). BUT if they were not previously used to full sun, you will have to work your way up to it (slowly). Introduce them to more sun every few days, until they are in the sunniest spot you can muster. I can't help on the first one (besides that it is an Echeveria), but I think the second one is an Aeonium 'Kiwi'. I don't have any Aeoniums, so I can't say on light requirements.

I correctly identified this plant as Peperomia caperata "rosso". I happily was able to purchase a beautiful specimen of it today at a local nursery.