Yes, you can. Even if you sell nothing yet you can make money from your website by placing Google AdSense on your website. But then you will have to devote some time to your website on regular basis.
Your posts can make money for you only if you post useful or interesting content, choose a niche that interests you and try to engage your visitors on your website, the more you write, the more interest your website will hold and the more people are going to browse it.
Cost per mille (CPM), sometimes also called cost per thousand (CPT). In Latin mille means thousand, the term on Internet is a commonly used measurement in advertising. CPM ads can be purchased on the basis of showing the ad to one thousand viewers.