You don't need maven to start the server. Running standalone.bat is sufficient. However, something is wrong with your JBOSS_HOME configuration and, possibly, your JAVA_HOME. Please double check that both of them are pointing at the correct location on your computer.
Yout enviroment variable JBOSS_HOME is wrong, net put /bin in these variable.
In your case must be only JBOSS_HOME: "C:\jboss-eap-6.2"
Actually, never set JBOSS_HOME explicitly. The scripts are designed to that themselves. Just set JAVA_HOME to point to your Java installation and run the startup script. That should be enough.