welcome to the forum!!!
if your wanting 1/48.
as for the figures you will want Hasegawa 1/48 us ground crew set A. this includes the starter thing and personel figures. as for 1/48 hummers or hum-vee's i dont think you can get 1/48...well i have searched high and low and found nothing!
here is the hasegawa set:
http://www.netmerchants.co.uk/product.php/3111/0/