1. The autothrottle is armed and the lever are advanced to 40%. When the engines are stabilised, they are further advanced until the autothrottle becomes active and places them in the TOGA detent. This will give the thrust selected on the TRS page.
2. By selecting LVLCH on climb out.
3. Something for engineers? I've never used them.
4. Me - Try to hit green dot at the top of the glide slope and select Flaps 1. At 5nm, lower the gear, Flaps 3 and set speed 140. At 1,000' set Flaps 5 and VAP. With ice speeds add 10 Kts. For cloudbase below 2,000', configure so everything is set and selected by 1,000' AGL.
PM