If you have an "authentic" Kiowa Love Flute, it is unlikely that you will be able to play much traditional (western) music on it, or play it much with other instruments.
The traditional love flutes are not tuned to any specific scale of notes - each "lover" creates his own unique "love song" to fit the notes that his own flute happens to play.
Look in the "International" section of one of the better record stores, and you should be able to find a couple of "native" musicians who perform some beautiful, if unconventional, flute music.