>> I can only select a template without libs when I choose JSF 1.2.
If you really need to use JSF12/JSP with JSF libs which are not bundled to the server (which is ussual case) then you can add it manually to the WEB-INF/lib folder or link it to the project classpath. Also you can use WTP JSF faset (Project facets/Javaserver Faces) to set up that libs. This is feature of WTP and JBoss JSF Tools doesn't use this facet.
>> "Dynamic Web Module" is set to 2.4. And when I try to set this to 2.5 I get an error that this is not possible.
>> Even adding the Custom Capabilities in Menu "JBoss Tools" is not possible. This hangs the whole IDE and I have to cancel it.
These bugs have been already fixed.
Please use last JBossTools 3.0.0cr1 nightly build.