Most toiletries are provided - shampoo, conditioner, body wash, handsoap, toilet paper, kleenex. Toothpaste is not provided.
Back when DVCs had the couch beds, and we had a 5th guest, at the resorts that wouldn't provide a rollaway bed, we'd order mattress foam pads. they would bring up to 4 of them, single size. Rather than use them on the couch mattress, we stacked and wrapped them in a bedsheet, and it made for an acceptable bed on the floor and saved having to bring our own air mattress or bedding. It worked fine for a bunch of 20-somethings up there to party around and enjoy.
I often go solo or with 1 friend, and since I have enough points to support it, I pretty much always pick the 1-bedrooms. Biggest advantage over studios is the availability...studios always book fast, and that tends to leave lots of 1-bedroom inventory - since I go 4 or 5 times a year, that makes it easier to book even on shorter notice - sometimes I'm booking trips only 4-6 months out and can usually still find a 1-bedroom somewhere.