Use this code to show the content of a post or a page:
<?php the_content() ?>
Use this code to show the title of a post or a page:
<?php the_title() ?>
This page can be useful if you are new to designing WP themes:
http://codex.wordpress.org/Site_Design_and_Layout
Here is a list of the template-tags you can use in your template to show info like date, nvaigation, comment-field, comment-form, title, excerpt, content etc:
http://codex.wordpress.org/Template_Tags
good luck 🙂