My Timeline window is missing lots of controls

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."