Your garbage collector will not pick up appliances, furniture, or mattresses. Please call Seattle Public Utilities at (206) 684-7665 for collection, The cost is $30 per item, plus an additional $8 for items such as old refrigerators that contain hazardous chemicals such as chlorofluorocarbons.
A better option may be to arrange with one of the many local charities to collect reusable items.
Please be mindful that improper disposal of garbage can result in penalties, which may include large fines, citations, and/or arrest.