The Echeveria looks like it needs water, but I would definitely repot it first into a container with a drainage hole and into a mix of 50/50 perlite and c&s soil. If that's moss on top then that needs to go because it will only keep the soil moist and encourage rot.

Generally, when something is overwatered, the leaves will turn translucent, yellow, and mushy (or look full of water and easily fall off; I've seen both). If it's underwatered then the color will stay the same, but the leaves may not be so rigid and even wrinkle.

Also, make sure to give that Echeveria lots of light. On a windowsill indoors may not be enough for it.

I would first check if it is too wet: the reasons are that it has been only 1 week since you have it and you don't know how wet or dry it was kept before. Too wet is generally worse than dry. Containers without drainage holes keep water at the bottom for a long time. On top of that, 'soil' is covered by wet moss - another no no for succulents. It is used for decoration - but without any consideration for health of plants. Gravel would be more appropriate for plants that have originated in arid climates.

OTOH, it could be dry if it wasn't watered or peat has become hydrophobic (peat is medium most often used by growers, so I am assuming that's what it is in).

It would be best to take both plants out and repot into individual pots with proper drainage and into a fast draining mix.

I can't ID your cactus, but other plant is Echeveria runyonii 'Topsy Turvy'. It definitely needs more light too. You can see leaves being too opened up in order to catch some more light. Try not to handle it too much by the leaves so protective coating doesn't rub off - not so easy while trying to repot or take off some offsets as you can see some marks on mine :)

Unless you get a pot w/ a drainage hole, pls don't do anything else. That alone will make or break this. Pls take that mossy stuff off the soil; it only serves to encourage decay.

thanks guys! will take the mossy stuff off the top and attempt to re-pot. The shop it came from was indoors and didn't have any windows which is probably why it looks the way it does. I've got it in a south facing window. Unfortunately, I'm in the pacific northwest so not a ton of sun this time of year. hoping spring brings less rain and more rays. any tips for repotting? worried about damaging them (also worried about stabbing myself as the devil's tongue has some massive spines on it)

Try to avoid pots with fat ‘bellies’, ones with top diameters less than their widest parts as it’s difficult to repot if they get full of roots. Regular plastic pots are fine....as are terracotta ones but they require a bit more knowledge when it comes to watering. Try using two or three pieces of kitchen towel to cup the pokey one in your hand when you tip it out.

Gill