Information

Tourist Information in Timbuktu

Bureau Régional du Tourisme

Has a list of recommended guides and can advise on trips further afield.
Post in Timbuktu

Post Office

Sells postcards and stamps - for that all-important postmark.
Bank in Timbuktu

BDM

Does cash advances on Visa card and Western Union transfers.
Police in Timbuktu

Commissariat de Police

Police.