1. Quick select is in the toolbar as shown. If you don't see it click and hold on the same slot and you will see alternative tools that share that slot. If you still don't see it, go to Edit, toolbar and reset the toolbar
2. If your layers menu items are ghosted, what is the image mode? If it is indexed change it to RGB.
3. I'm not sure I understand the question. Layers should be visible in the layers panel, if you don';t see that can you add a screenshot.