1. Nope, the only game you're in a pre is Prophecies, and NF & Factions are both... "in the world today".
2. Just do quests and farm what deems most effective to you. I just kept killing everything under the bonus in whatever area.
3. To get experience, yes.
4. I wouldn't advise it over /W for stuff like "Watch Yourself!" for the energy management and the armour bonus, also for "Save Yourselves!". /Me is good for things like Cry of Frustration, /Rt for a hard res that is fast casting and effective, /E for conjures if you really want them, /N for Enfeebling Blood and cheap enchant removals, /Mo for hex / condition removals. I'm going out on a limb for this one, I only use Cry of Frustration, Enfeebling Blood and Save Yourselves on my Paragons.
5. Your build shouldn't concern you nearly as much as leveling up to twenty with all attribut points at the moment. Until then the base of a Paragon build is:
An IAS. Aggressive Refrain fills this slot usually as it's the best IAS for a Paragon. Use Drunken Master if you're using consumables though.
Basic energy management / support shout. "Watch Yourself!", "Go for the Eyes!" and "Save Yourselves!" fall into this category. Go with things like Chorus of Restoration if you're not bothered about the casting though. Shouts would be best because you can still deal DPS with them and they don't require investment to be effective at energy management.
An attack skill. Spear of Lightning, Vicious Attack, Spear of Fury, Spear Swipe or whatever energy attack skill. The only adrenaline based attack skills I would use are Blazing Spear, Spear of Redemption and Wild Throw. Stunning Strike and Cruel Spear are extremely good too, but Barbed Spear is recommended with Stunning Strike.
A shout or chant to keep Aggressive Refrain up. Anthem of Flame, Anthem of Weakness, "We Shall Return!" or in the case of an SoR (Song of Restoration) build, Ballad of Restoration. You'll need this to actually keep AR up indefinately, and they're practically free. Leadership should always be at least 10.
Elite skill. "Incoming!", Defensive Anthem, Cruel Spear, Song of Restoration, Song of Purification are all good.
Last 3 skills. Support, more damage, do whatever you want. Don't put junk in there though like Healing Breeze and the likes. Put in useful stuff such as Enfeebling Blood, enchant removal, other buffing shouts such as "Never Surrender!", Anthem of Envy, Bladeturn Refrain (In areas with lots of slashing damage ofcourse), "They're on Fire!" if you're running multiple SF Elementalists, Mending Refrain, and support stuff like that.
Just to end this, don't double post because there's an edit button and read the stickied threads.
As for your most recent post, you have to go into your account settings and add the key to your current account, and if you make another account I believe it's irreversable.