The background stamp made up of tiny dots and swirls is the Impression Obsession stamp called Cover a Card Fluff. It can be purchased at SimonSaysStamp.com or at FranticStamper.com and other places I'm sure. Frantic Stamper ships things out much faster and you will normally have your purchase within 2 days.
The tree die is the Grand Willow Tree by Memory Box and the ghosts are also by Memory Box. The "BOO from the Crew" stamp is one I picked up years ago at Michaels. The signs on the trees are just stamped and hand cut then inked around the edges.