hi there
1)aero kits available from lexus but theres always someone on here whos selling bits,i think gords got a few bits for sale
2)h4-9006 bulbs(many have hid's)
3)same (i think)
4)theres a place in the states that does them,woz will help with that or look through his posts
5)1 keys not a prob you can get a spare blank off ebay with no transponder unfortunately(just do a search on how to reprogram)
6)on the buy and sell section,like i said theres always someone selling stuff that you'll either need or want
hope this helps
azz