well of course all your stats increase...
when you spawn a warrior at lvl 1 he'll have about 140-ish health. considering that the boss in the wailing caverns (lvl 20 instance or so) does about 210 damage per hit, that would make a VERY bad tank ;p
you can find some incomplete info overhere:
http://wowvault.ign.com/View.php?view=Stats.View
but i really dont see why you want to know this in advance...