I'm using CS6.
Can someone tell me how to display all the controls of the timeline window ?
Here's what mine looks like:
All the demos / tutorials [show the timeline quite differently there:
I think you want to toggle between frame animation and timeline. In the lower left-hand corner of the palette — next to where yours says "Forever" — is supposed to be a little icon which sort of looks like a bar chart with a triangle on top. Click that. It will convert to the palette shown in the demo.
Why yours doesn't have that I can't say. Try clicking around and see what it needs to activate it.
ETA I found it: in the palette options fly-out, four up from the bottom, select "Convert to video timeline."
I guess, you should have Photoshop extended so you can open all timeline features.