Hope you have a great FIRST at WDW!
Yes there are coin-operated laundry facilities at your resort.
They are located in each "village". At check-in you should be provided with a map and the laundry will be on it. Advice, from a frquent WDW visiter -- bring your own laundry detergant in a ziplock bag, and dryer sheets.
Pool towels are available at the main pool (themed pool), you should request additional towels daily (to use at the quiet pools -- closer to your room). Call "mousekeeping" when you get settled in your room and ask for a certain # of additional towels daily. Remeber to give them the dates of your stay.
Have a GREAT time at WDW~!