Spell check. It solves your spelling issues.
1. You should be fine for ToC 10 reg/ICC 10 reg. Your ideal group: 1 rogue, 2 tanks, 3 - 4 ranged, 2 dedicated healers, 1 healer/dps hybrid, balance out w/ melee. Bring the player not the toon. Seriously.
2. Heroic modes I can't comment on, as I haven't done them.
Gearwise, you should be ok for ToC 10 Heroic. Your gemming is ok, I wouldn't use a str/stam hybrid, but that's me. I would put either def or stam on your shield if you aren't going to put plating on. There is an awesome shield off of Lootship Lollipop, I mean Gunship Battle. If you manage to get Anub'arak's shield before the one on Gunship all is ok. I still like Neverending Winter better, tho. (Lootship)
Spec: 0/53/18 is the "cookie cutter" You really do not need 2/2 in SA for raiding. Move it over and finish out Crusade (to 3/3). Everything in ICC is undead, and 1/2 of the stuff in ToC is. Reckoning is not the best option. Put those 3 points into Div Sac/Div Guardian. I'm not gonna beat the dead Judgements cd reduction dead horse, but moving one point out of there to PoJ (and one from Conviction, too) is a good plan.
Glyphs: Change SoCom for Seal of Corruption/Vengence.
Enchants: People will tell you to change shoulder enchant to the stam/resil one (costs 10k honor). +275 health to chest. Stam to bracers/gloves. (Heavy Borean Armor Kit for gloves). Belt buckle + stam gem in belt. Put stam on boots if you spec into PoJ. Since you are an engineer, MAX IT. Take advantage of the armor enchants you can use. (gloves, I think?)
Watch vids, do the fights, it's all about learning by doing.