The Free, basic accounts does not offer sellingquarters or downloads, and limits your number of active songs to 3. But, there are still ways to get the most from the account:
Offer new content each week or so
Use the Welcome Message and Liner Notes to Plug Other Interactions
In admin, you set the welcome message the fans see when first visiting your page. And for each track, you can use the Liner Notes to encourage other listening and purchasing opportunities.
Basic not cutting it? Consider upgrading.