Program BLOG in my new HTML Template

Hello, I purchased a HTML template and it has a BLOG part that needs to be programmed. Basically i want to be able to add a BLOG post either via a backend and then it populates the FRONT end. It will need to have: - Date posted - Category - Allow for comments - Automatically post to my Facebook and Twitter account too. etc I have attached the template HTML files (NOT PSD) so please have a look and let me know what is the best option. Thank you,