An earth can be taken from a solid metal surface joined onto the body, ideally I would go for a body earth already made by toyota as you know it's a good earth. The live wire will go onto you ignition live, there will be 4 wires behind your ignition barrel, main live feed( thick red most likely) earth ( thick black) and two slightly thinner wires, you will need a test light or multimeter to test these two. One will get power when the key is in ACC position and the other will get power when the igntion is on, you need the one where power is at the wire with the ignition on. The illumination wire will go on with your stalk for the lights, again you will have a main live, earth and several others which only come live when they are switched, just connect it to the wire which is live when dipped beam or side lights are on. Hope this helps Gary