I can tell you've read http://maintankadin.failsafedesign.c...m-enhancements because your gemming and enchanting is all wrong.
To answer your questions first
1) Yes, I'd probably tell you to pick up the gloves too, then get the chest after that
2) The 2 set bonus is good, but not great, unless you're not losing any significant stats, then break it and don't care. Maybe your change your shoulders. The T9.245 may be better than those, not sure though
3) The T10 set bonuses are kind of weak, armor stacking should be your first priority, especially for ICC. Go for shoulder/helm T10 2pc right after the gloves/chest though
4) Chest before helm
If you can afford to buy the mats for Pillars of Might, then I would highly suggest that.
On to your gear specifically, gemming/enchanting for warriors and pallies is pretty similar. Piece by piece:
Helm/Neck are fine.
Shoulders: Enchant with 30stam/15 resil PvP enchant, 10k honor from honor vendors in stormwind
Cloak: Enchant with 225 armor
Chest: Enchant with 275 HP
Bracers: Typically shy away from gemming a bonus unless it is 9 stam or better, since this is only 6 stam, gem out of it and put another 30 stam gem in where that hit/stam gem is
Weapon: mongoose is an extremely strong enchant for pallies, I recommend you re-enchant your weapon
Shield: I really pref 18 stam to shield
Trinkets/Rings/Boots are good
Legs: There's really no reason to use a 10 to all stats gem, you'd only get 5BV from the str from it, the only other beneficial stats are agi and stam. If you instead put a 10agi/15 stam gem in there, you effectively lose no relevant stats, and gain 5 stam
Belt is fine
Gloves: Change the enchant to 240 armor or 18 stam, 240 armor is about 3 stam better in terms of EHP, but loses its value in magic heavy fights.