Yes. As mentioned by others, if the furniture is in usable condition, you can drop it off at the donation area of the landfill. The mattress will need to be disposed in the household waste section. Just check with the attendant when you drive up and they will provide you with exact disposal directions.
Sure can
Yep
Yes
Yes you can. You can either donate it depending on the condition or dump it.
Yes. I've seen people do it.
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