hey - my whole house is full of 'throw-aways'. I love to take plants out of the garbage. New plants cost a ton!
Anyway, yeah, there's plenty of good repotting advice I could give... but I'm tired and pretty deep in my cups, so now might not be the best time.
I'll address your specific plants.
First off, the aglaonema, or plant in the little container. Pot this one up into a 7" plastic pot. Just pull it out of the container it's in, try to unspool the roots at the base of the root mass, and put it into the container. Main BIG IMPORTANT THING: keep the soil level the same. Don't put the thing a the bottom of the pot and cover it with soil.
This plant likes to get NO direct sun. It likes to be moderately moist and dry out between waterings. If it stays wet, the leaves will have tip burn. If it flowers, it is getting too dry. Pull the flowers off as soon as they appear, as they will attract pests.
The pothos - long stringy plant, is the easiest plant on the planet. Give them both a SERIOUS haircut. Cut the vines at less than 8-10 inches - or so - from teh soil. You can put the ends of these cuts into water, and they will create roots. This is asexual propogation, and basically the way this plant is made. Once the roots form, post up and we'll go from there.
Pull these guys out of the pots they are in currently, pull off the crummy looking white stuff - salts, etc.. - and gently unwind the roots a little. Put some new soil in the base of the pot, and put them back in the same container.
The pothos does NOT like direct sun. Moderate light is good. Indirect sun near a window will cause crazy growth.
The pothos likes to be moderately moist - like a wrung out sponge. It does not like to get dry. It does not like to be wet wet.
For both plants, use general purpose potting soil. Just whatever you got, or whatever comes in the smallest container.
Give them a couple of weeks to adjust to their new soil, and then start watering them with a mild fertilizer solution as mentioned above. Weak miracle grow mix is great.
The janet craig on the stairway looks great. 4 canes, very nice! Love those banded, emerald leaves.