To change the front lights..
- Remove the grill (4 clips along the top, 1 clip under each headlight)
- Disconnect wiring plug from back of headlight
- Undo the 4 8mm bolts holding the light on
Simple as that

To change the rear lights..
- I find it easiest to remove the bulb holder first which is clipped into place with two clips
- Undo the 4 8mm bolts holding the light on
Also rather simple

Regarding headlights.. try venom motorsport, or ebay