1. Prefs menu in ML. Powersave in liveview.
2. Not in ML. Pretty easy to batch resize in many different programs though.
3. Intervalometer unless you want really small intervals.
4. You only need to use fps override if you want small intervals (using video recording). I just did a quick test, and it looks like silent pic is fine with intervals of 2 seconds or greater.
5. Turn off global draw. Longer intervals. Turn off LCD with powersave. If you need more power you can get an external power supply.