I've got a few questions about General Grievous.

1. Who's lightsabers are the ones he used in the battle against Obi-Wan on Utapau?

2. Where did he get said lightsabers?

3. What did he look like prior to his speeder accident?

4. How did the Seps rebuild him?
and most importaintly...
5. Why does he hate jedi so much?

I need awnsers in comments, so they are totally welcome.