Unpack the tomcat. To get access via http://localhost:8080/manager/html to the tomcat manager site you’ve to configure a user with manager-gui role. It is good practice to give the administrator admin rights as well.
The easiest way to deploy is to drop the war-file into the <tomcathome>/webapps directory. During development it is a better approach to create a context pointing to the target directory of your web app in development. The deployment directory is <tomcathome>/conf/Catalina/localhost. The structure of the deployment descriptor is like this: