TripleX...
Everything you need comes in the kit, including all new bolts.
IF your body mounts are in bad shape, you will need to replace them on your own (the rubber parts that the lift blocks bolt to, which are part of your truck and not part of the lift). Most of the mounts are still in good enough shape, unless you live in northern states with a lot of salt use, then all bets are off.
AdvanceExpo...
Yup -- the brake lines will just move with the lift. Just make sure that they don't get kinked. You shouldn't need any extra parts to do the lift, but it never hurts. Now, extra help is a plus -- as long as they are not the type that want to give instructions versus doing work...
Like too many cooks spoil the soup, too many technicians spoil the body lift.
The wood blocks are to use to spread the load as you are lifting the body. Place them under the floor pan, and jack up against the wood. It works better that way than trying to lift on one point of the floor pan. If you do it right, and have the jack in the right spot, you can lift the entire side fairly evenly. The balance point is somewhere near the center of the rear doors (if a 4 door model). The rear of an Explorer body is heavier than the front due to all the interior, and rear hatch, glass, etc.
Don't forget the bolts on the front cowl (the part that holds the radiator in place)!