That is not a Seam problem, it is a Tomcat problem, I guess your Tomcat is using port 8082 and another software is using that port too. (Or you are trying to start Tomcat twice).
This is the kind of problem one has one one is starting with Java based web development, and therefore I really recommend you to read something like Head first servlets and JSP before trying to digest something as complicated as Seam.
Please do not misunderstand me, I mean no insult, is just that if you are having problems with Tomcat port, dealing with Seam will be too much for you current level of knowledge, I really recommend you, when you finish reading Head first servlets, to read Head First EJB, and then JavaServer Faces and finally Seam in Action.
Believe me, trying to skip all that reading will only give you lots of headaches and lead you dead ends.
Thanx Fransisco for the reply.. it's a very great suggestion. i will follow your suggestion. thank you.