So did I understand it right, that I have to install the whole Genesis software first?
The Teen 5 set are not standalone figures. Even if you are using Daz Studio, you have to install Genesis to have them work.
It’s been covered in many other threads, but Genesis is the basic mesh for all the Generation 5 figures. It is very versatile and can be used to make male, female, creatures, trolls and toon figures. Especially handy is fact that if clothing fits one Genesis it will fit all others for most part.
This is not a new concept. DAZ has started doing similar with Victoria 4. V4 is the base figure. The other additions of Aiko 4, Stephanie 4, and The Girl 4 all required that V4 be installed first since they were only morphs of V4 and not standalone characters.