This is a different answer to your question about your German tremolo harmonica. In your other post, you didn't specify that it is a tremolo harmonica.
Here are two free websites that will introduce you to playing the tremolo harmonicas:http://www.thetremolo.ponderworthy.comhttp://www.harmonicalinks.com
Here are two free websites for learning Euro-American tunes. They use the standard slide chromatic and standard 10-hole diatonic harmonicas. But, the 10-hole diatonic harmonica has the same reed positions as the standard tremolo harmonicas.http://www.harpinanawhinin.com
This site uses music tablature, not traditional music notation. It has pre-recorded tunes that you may play along with.http://www.harptabs.com
This website uses music tablature, and has no pre-recorded tunes for play-along. It is set up for the 10-hole diatonic harmonica.