People in my area of the world get rid of their old furniture for free in these ways....
Set at the end of your driveway with a Free sign.
Put an ad in the paper for free furniture, it should only cost a few bucks.
Put an add on Craigslist for free. Just tell them where it is and whoever wants it will let you know and come to pick it up.
Drop the furniture off at a clothing center or thrift store that accepts donations.
Hope these suggestions help:)