1. Don't know why but don't be scared. If you are driving fairly sedately for the last 2-3 minutes of your journey then you don't need the turbo timer anyway. I rarely use mine these days.
2. Sounds like the oil isn't going through at idle.
3. I think you have a loose connection to the battery, the alternator or a major earth like the engine or chasis (there is a lead from the negative of the battery to the chasis to the engine - check that)