> - Do I have to kill possible carriers in order to discover
>one?

Often you do.

>
> - Could they be carried by any mage or can I rule out some?
>Like guildguards,shopkeepers,generic mages (like the ones in
>tower or azuremain)

Yes guildguards and guildmasters can have them.

>
> - Can I discover any wands if I look around hard or do I have
>to attain a certain rank for being able to discovering
>some(levels 37,42,47 as the helpfiles suggest)

30 for amber and sienna, 35 for black.
>
> -Can I find more than one source for a single wand ?

If you attune
>
> - Are the wands carried by the mobs with respect to their
>levels (e.g. No barrier wand from the mages in aldevari or
>copeham inn)

sienna tends to be from lowbie mobs but not always, amber from midranks but not always, black from high ranks.
>
> - Can they be in explore areas or just the regular areas?

Yes they can be from area explore, but generally if they are, they are not on mobs, but just grabbable.
>
> - How does the detect artifact spell work? (I am yet to learn
>it though)

You get it, turn it on, walk into the room and youll get told its in the room
>
>Any pointers would be greatly appreciated..
>