1. Sun god.
First of all dodge his fireballs by jumping from one pillar to another. Once he stops, then jump to the third pillar and stand on the box to take the gem. Let the fire pass below you before getting off the box. Jump back onto the pillars and then jump to your right (it is the direction to the left if you are still looking towards the sun god), here you should find a platform and another box, put the gem on the box. It will lift a barrier and allow you onto the next set of pillars. Repeat the dodging, gem stealing and gem using here, then at the next one and at the final set of pillars.
2. Proper Place To Post This http://www.peelified.com/cgi-bin/Futurama/15-000298-1/
3. GameFAQs in case mine isn't exact or whatever enough. http://www.gamefaqs.com/console/ps2/game/32867.html