Ilter,
coincidentally, we were just discussing how to use JAX-WS on
Tomcat in
this thread. You don't need any tools or
J2EE server, besides the JAx-WS reference implementation, Tomcat and
Ant.
Start with one of the RI samples (e.g., the one called "fromjava"), figure out how to run the apt tool that generates server-side classes, deploy the service, learn about the "@WebService" annotation and the related ones (@WebMethod, @WebParam, @Webresult, @HandlerChain) that define a WS.
This article might be of interest.