The hinge screws are nuts and bolts on the door side, captive nuts on the wing side. Its good for getting the captive ones out but with the nut/bolt one it will just turn, you are better cutting the nuts off with them.
Just a standard center punch is all you need, get a kit from machine mart or somewhere similar, dont bother with fancy stuff. One of the best places for tools is car boot sales, the old stuff is the best stuff, some of my toolkit is from my grandad and well over 60 years old....
This is the kit I use:
If you look at the top of the forum there is a section there which explains how to find green lanes, its very difficult to explain where they are as they aren't roads as such and wont show up on most maps, you need an OS map. Best thing to do is come out laning when we organise a night, hopefully some time soon, just waiting for everyone to have a working truck first!!
Dont worry about being a newbie, there are very few lanes that are of any real difficulty really, if they are there will be an easier route through most times. I took a friend out last weekend for his first time in a Pajero on AT's, first lane we hit we was faced with 2 footbridges in the road, it took a while to get his back out the ditch (had to cross a wheel on the bridge and one in the ditch) but thats part of the fun... First time I went out with this lot I spent 2 hours in a 4ft deep hole in -5 temperatures, that was an interesting and bloody cold night!!