T-100 = Toyotas intial foray into making a larger truck....it's officially known as a "mid size" but carries *most* of the same running gear as a standard hilux type.
Taco (tacoma) is the '96 and up replacement (US only) for the older model Hilux pickups, AFAIK
all Tacos are built in the US which is why you've never seen one over in jolly england.
Your Hilux = our Deluxe, or DLX
You should see the new Tundra, it is full size (same basic size as a Ford/Chevy/Dodge full size) and they are sweet.....but you guys don't see many full sized anythings over there...sorry.
I was born in Scotland so I am familiar with what you have....
Trade you my truck for a Cosworth RS