Actually theres a limit of 50 chars per account. (Most people never make that many so the assume its unlimited, but then again i'm a freak).
Nope same key is fine.
No, yu use both spells, but yur talents will determine which will be stronger in certain aspects as yu get to be high level.
and I recomend Druid!
"Let justice be done though the heavens fall." - Jim Garrison
"Ask not your horse, if ye should ride into battle" - myself