hi, I been to Turkey myself and know where Kusadasi is. I looked up Pamukkale as well. There is a main road near Pamukkale that goes to Kusadasi . I know it is a tourist attraction and the coaches from Kusadasi take about 3 hours. A lot of companies take tourists there to look at this natural wonder.
Be warned - it is hotter in Pamukkale than anywhere else in Turkey, so take plenty of water so you don't get dehydrated! It is well worth seeing though and takes about 3 hours