Deductions & credits

No.  The cost of staging is an allowable expense (advertising) as long as no permanent changes were made to the home.  (If staging included painting or small repairs, those expenses are not allowable.)  Moving out your old furniture might be allowable, but I'm on the fence.  It sounds like a personal moving expense.  But the cost of storing it because your new place wasn't ready, is definitely not allowable as an expense of advertising your home for sale.