Hi, I don't advertise that it's provided otherwise they'll expect that its theirs to take.
But I do have a drawer filled with all sorts of misc things that guests have left and I do make sure that there is a spare toothbrush (I've gone with the non branded airline style because the branded ones go straight away) and sanitary items etc. It's really for the emergencies, not for their stay. There's all sorts of things in those drawers, but I do draw the line at used soap bars!
Note we do provide shampoo, conditioner etc in refillable pump bottles in the showers. They are expected essentials.
As for first aid, absolutely provide a first aid kit, and yes the bandaids/plasters/paracetamol goes first.
Hope this helps Regs MK