Welcome to the forum.
Looking at the photos, doesn't look like any issue, just dusty. The walls are clean so it hasn't been used. My guess is wood from the box got out and bounced around during transit?
Just wipe the dust/wood out with a damp cloth (don't use chemical) and go for it.
Follow the info here (read my post at the top of this forum on where to start).
Season it first then smoke away...