1 under the normal rear jacking points
2 it's not a torx bit it's an 8mm allen type socket with an 8mm straight allen key. unless somebody changed them. Make sure the key is completely in the slot before you put any weight on it. the slot is very shallow. probably pay to clean the slots out with a small screwdriver and compressed air if you have a compressor
I had mine out a couple of weeks ago.
3 for the hole, look at your V8 cradle when you get it out, you will see it then. drill one same size in the VZ cradle, no problem
Glowworm, scissor jacks are deadly to work under. even with tyres under. best way to go is trolley jack under the diff and stands under the jacking points. if the car is too low for trolley jack, put the scissor jack under the side and lift the car until the trolley jack fits under.