Congrat's on going the LR community!
The G4 roof rack is very cheezy, save your money and go with a alternate system. I have a Hannibal rack for off roading, using Thule load bars. I also have a Yakima Skybox that clamps to the Thule bars for more freeway oriented touring. Yakima also makes a roof top basket/rack system that works well if you are looking for something cheaper than the Hannibal (from Atlantic British).
The brakes and tire wear issue are well known. Most people are replacing pads at around 15,000 miles and some have had to do rotors also. The LR3 is a heavy beast.
The tire issue is due to bushings that wear our quickly and change the camber settings. I HIGHLY recommend spending the $60 to get your alignment checked frequently and often. It will save you lots of money in tires.
Tires: The factory Goodyears are exactly that, good for one year. Budget for a decent tire soon, especially if you are going to take your truck off the tarmack.
If you are in SoCal, check out
www.sclr.org and come out and have fun with us. Pismo is coming up, you will love it!
Regards,
NW