i got some from home depot near my house, you just need to wash the leaves off.
those plants sound great pothos have nice large leaves..i also got an umbrella plant..im not sure the botanical name of it. it looks like little umbrellas. i know my DiVinci loves his umbrella plant he fits the perfect size of the leaves so he sleeps on a single leaf lol.
make sure there are not fertalizers in the soil..they are the small little red and green balls..the white chunks that are in the soil are just part of the soil..my mum did a lot of work with plants and knows a bit about them, she said those are not toxic so if you see those in the soil its ok.but them small balls red and green color those are chemicals..so you need to be carful..but just wash the leaves and you should be fine. (: