First, you get down on your hands & knees. Then you get back up & find the ratchet that turns the nut holding the tire in place. Then, you get back down on your hands & knees. No, get closer to the rear bumper, then get down. Now, use the tool to turn the nut. To the left! Use one arm to hold the tire up. Now, turn the nut. To the left!

find the long handle and wind the ratchet that holds the spare up down. there will be a hole for it to go in 

You have a Holden?

You are better off dumping the whole Ute and keeping only the tyres.

The tyres are the only things that are worth any money on a Holden these days, and I’m including the new Holdens in this too.