I'm going to answer the second part first, for reasons that will immediately become apparent.
Tarvyn DralorWielding: A steel bow.
Wearing: This one's a lengthier answer. Tarvyn seems to be collecting clothes at the moment. And tends to wear them for different reasons:
He'll wear a dark shirt with blacksmith's pants(trousers

) and doeskin shoes when travelling.
He's got a set of burgundy linens with shirt that he sometimes wears around town.
A green brocade doublet with trousers and shoes to match. He's not actually worn these yet, he's working on something to stop the doublet's sleeves fouling the bowstring.
Two robes, one green one, complete with hood, and the other is Mages Guild blue. he's not worn either of these yet either.
But his preferred outfit is one he didn't think suited him, he wasn't exactly fond of it but it grew on him. A black and burgundy outfit with gold trimmed shoes. makes him look comically overdressed when in Bravil, but what can you do?

I think he's overcompensating for crossing half of Cyrodiil wearing nothing but sack cloth.