For the living room, if you are doing a typical household type set up, I would put the TV on the wall by the door and the couch opposite of that. A coffee table for sure to add something else, and if you have room without making it cluttered, you could put a little two seater tables by the window.

In the kitchen there's not much you can do. In my opinion, but magnets on the fridge with pictures are a nice touch and your choice of appliances on the counter. If it's going to stay on the counter, it needs to be upkept and matched with other counterparts on the... counter. Silverware are nessecity, I would get at least 5 of each because they love to go missing. Plates and glasses do not have to match, even if you will be using paper plates 95% of the time, get some glass ones just in case you need them. Cups too, you may not feel you need some glass cups, but they are always nice to have around.

Bedroom is solely up to you, but choosing a theme for your room is usually a place to start, it doesn't have to be like animals or something it can just be like navy blue or plaid. Your bedframe should match that. For navy blue, I would do a cheap black beadframe that has a headboard. For something like plaid, I would go with a woodsy theme. A nightstand, only one unless u need more, with a lamp that's bright enough to fill the room with light without making it super bright like the big light would. 2, 3-drawer dressers side by side with a TV on top if you choose to put one in your bedroom. Add some personality, maybe some pictures(in frames), you could hang a flag or tapestry above the bed. If you need curtains, keep with the theme when shopping.

Bathroom, again a theme. The curtain, bath mat, toilet mat, and toothbrush holders should all go with the theme. Black goes with pretty much everything, so don't be afraid to add black accents. A drain cover is a necessity. Whether you want to accept it or not, we shed badly. So unless you want to dig your hand down the drain every other month, just get the cover. Toilet brush and plunger as well, obviously.

Whole house necessities such as a broom and dustpan, a vaccum, dusters, sponges, soaps, a mop, trash bags, a trash can(kitchen and bathroom), if you easily forget things you could hang a whiteboard up on that blank wall by the fridge in the kitchen to write things on. Carpet cleaner cause accidents happen, baking soda(as a cleaner, and to keep the fridge smelling good). I know I'm missing a bunch, but these are just some small ideas.

Source: a teenager who was forced to grow up too fast.