Will there be a First Name / Last Name System?
I want to save a character name and I don't know if I should save just the first name or the whole thing.
ex: John or John Doe

Will there be any Names that are banned?
Either at the start of the game or for other reasons later (offensive/inappropriate/etc.).

Will there be any kind of help or guides for Names?
A list of common Eldar/Ork names, etc

You can use whatever you want really, you can have a space bar too, its just on one a single bar instead of two.
You can just make up a name or use an online name generator specified to something like this.
You can remake a character if you want to, you wont loose any items or anything, just redo it all.

Just no swear words or offensive language.

This might help too mate: Naming Conventions by @IvanMulkeen

Also, I don't think they will allow names from the game lore for many reasons.

Edit : Which is in the naming conventions as previously linked by Laanshor

I do not know if this is any help, since it mostly concerns Eldar.
http://forum.eternalcrusade.com/threads/character-names-in-eternal-crusade.21998/

Will there be any sort of in game title system? That would influence how I name my characters for sure.

EDIT: This was the question asked
"I have a quick question. Will character titles be in the game as part of progression? Like "Battle Brother/Sergeant/the Destroyer/etc"

"It's very likely that character titles will be present. It's a great way for your peers and enemies to recognise your martial or tactical prowess; role within a squad or strike force; and renown for playing a pivotal role in a major campaign. We want ways for players to distinguish themselves from their peers."

- MichaelChan in "Hey Michael! Tell us about Progression and Economy" page 3 post #23.​