Ill leave the armory to do most of the explaining when it comes to gear.
Around 55k in gold.
90 Human Paladin - http://www.maskedarmory.com/anonymous-wow-armory-profile-219459.html#
90 Human Preist - http://www.maskedarmory.com/anonymous-wow-armory-profile-219460.html
90 Human Mage -...