Their website shows mainly polyester threads, unless you are talking yarns, them yes they have wool yarns, but you might have more luck at Joann's Fabrics, they specialize more in sewing and cloth.
I'd say yes. They're aisles are tall. But you could always check online
I'm not for sure but probably at this store is amazing it has everything! Plan on spending hours.
Thanks! Your answer is awaiting moderation.