Star one: In Turpin's house, you may can find a star in a desk.
Star two: From the garden go to the north and get the star.
Star three: from the shop: go to east. Go on the rock path. Use Hocus Pocus spell to enter in the river. You'll find a star.
Star four: go in the well. Use the hocus pocus spell to turn you into fish. Go left. In the room with "Coco was here" written on the wall, don't use the hocus pocus spell now. From the right, seek out an hidden path to the top screen through the wall. You will find the fourth star.
Star five: once you've got a talisman, go back to the shop. Go east twice. Go near the star and get it.