Yes and yes. Most plants come in a temporary black plastic pot, which is not meant to be its permanent home. You might also find plants for sale in big box stores that are already in decorative pots, but a lot of times you’ll want to repot these anyway, especially if the plant is looking cramped. (Lift the pot liner out and check to see if you can see roots peeking through the drainage holes. If you do, a new pot is in order.) Occasionally plants come bare root (without soil) if you order online or acquire them at a plant swap. No matter what, you’ll need to learn how to pot a plant because at some point your plant will need to upgrade to a bigger home, so it’s a good idea to learn what you’re in for at the start!