To set your home page go to Settings > Reading, set the Front page displays option to “A static page” and then set the Front page drop-down menu to reference the article you want to display on your front page.
This is not a theme issue, this is standard WordPress functionality.
If you need to learn how to use WordPress then I can recommend the WordPress Lessons, they are a fantastic resource…
WordPress Lessons → http://codex.wordpress.org/WordPress_Lessons
If you can’t get on with the lessons and you need more help then you can ask questions in the appropriate WordPress support forum…
WordPress Support → http://wordpress.org/support/
Please keep in mind that we can’t teach you WordPress in this forum, you must go to the WordPress support forum or work through the WordPress Lessons.
If there is anything else about the Razor theme itself you need help with, please just let us know. If you can’t find a solution using the forum search please create a new topic for each separate issue and we’ll do our best to help. Thanks.