You can't run a LWJGL application like that, you also have to add the lwjgl jars and natives to the classpath, using something like the following:
java -cp Test.jar;lib\lwjgl.jar;lib\lwjgl_util.jar; -Djava.library.path=native\windows yourpackagename.yourMainClass
In your case you only have the Test.jar so java can't find LWJGL or its natives.
If you do just want to have a single jar, then you can use a tool like JarSplice
to create a fat jar, which will merge the lwjgl jars and natives into your jar, allowing you to just double click it to start.