1. I'm not sure about this.
2. Press I to initiate RWS mode after pressing 2 on the keyboard, or enable the N010 radar in the Russian fighters.
3. It is a bit complicated to use, but here is a manual for the FC2 GUI. Go to page 41 for mission editor tutorials. http://www.185th.co.uk/Flaming%20Cliffs/lockon_fc2_gui_manual_en.pdf
4. As I said, pressing I will turn on the radar. It will show rectangles for enemy units, and circles for friendly units.
5. There is no proper radar for the A-10A, only an RWR and a Maverick sight, assuming you are not using Easy Radar mode.
6. Go around 200-300 mph, press the K key, and pull up. Be prepared to stall!