In response to Blackice GTS:

http://img227.imagevenue.com/loc552/th_72545_random_desert_bus_122_552lo.jpg
Oshkosh MTVR, a 7 ton truck used by the US Marine Corps.

http://img45.imagevenue.com/img.php?image=72550_Coop_in_Japan_hardkeiIMG_0652_12- 2_983lo.jpg
I think it's the curiously named Daihatsu Naked.

http://img159.imagevenue.com/loc65/th_72555_DSC_6608_NSW_CYCLON_green_unknown_12- 2_65lo.jpg
Mitsubishi Cordia

http://img235.imagevenue.com/img.php?image=73782_srv8_pier_122_361lo.jpg
Your guess was correct, this is a Vector SRV8.

http://img207.imagevenue.com/img.php?image=73784_anime_Tyrell_F1_122_245lo.jpg
No clue what this is exactly, but it was the star car in an anime about futuristic F1 racers.