Hi,
You can first read the coupling sections of each user manual. You'll find how the models are linked together, the informations they exchange and how to set-up the right parameters according to your case. (It's explained that the mesh must be the same for the 3 models).
I advise you to first build each model separately, then couple them 2 by 2 (T2D/TOM and T2D/SIS), and finally T2D/TOM/SIS
I don't know if there is an equivalent of Baxter tutorial for Tomawac or Sisyphe, I think no.
But you can find test cases in the example directories of the telemac installation folders:
[path_to_your_installation]/v7p3r1/examples/tomawac
[path_to_your_installation]/v7p3r1/examples/sisyphe
I hope it helps.
Regards,
Laurent