1) Race doesn't really matter, other than making it difficult to get around in good race's cities and selling to vendors. BUT, Enchanters have illusion spells. You should already have the Human illusion spell at level 4. If you picked Agnostic as your religion, you shouldn't have any problems selling and banking in Qeynos, as long as you don't forget to put your illusion up. Also, being an evil race can be a pain because random NPCs will attack you on sight.
2) Same solution, Human illusion
[You must be logged in to view images. Log in or Register.] Just don't run past any gobos. (The Enchanter vendor isn't near the gobos though).
3) You said you are leveling up in EC? Get a clarity! (/w all Porcoa and if i'm close, i'll hook you up) And you can nuke all day. Once you get your charm spell, start charming. Charm a dark blue mob, sick it on another DB mob. Once they are both around 20%, root the one your mob is fighting and call your pet back. Then taper enchantment your pet and nuke the both for full exp. There are other ways to do this that may be more efficient. (I'm an Ench noob tbh). Another thing in EC, you can charm a willowisp and if it's a high enough level it can clear then entire orc camp without taking any damage, as long as a lego isn't up.
Like I said, i'm kind of a noob myself. Passing along what I have found out/learned from other players so far.
Feel free to PM me on here or message me in game. I usually get online around 5-5:30 CST.