is there a way to insert the title tag dynamically on each blog post via the cms?
CMS is software, and every software package is different. I will share there should be a way to do it, but you would need to search your CMS provider's site to get the details.
For your titles, I am not clear what you are asking. I would recommend the title tag for your blog matching your blog's title. You may want to add your site name or category name depending on the situation. For example if your site is "Chevyworld.com" and you have a blog entry titled "1982 Stingray, the end of an era" then the post title could be:
1982 Stingray, the end of an era
1982 Stingray, the end of an era | Chevyworld
1982 Stingray, the end of an era | Corvettes | Chevyworld
In the first example, your CMS would be adjusted to use the blog title for the title tag. In the second, the blog title plus your site name would be used for the title tag. The last example uses the blog title, the blog's main category tag and the site title.
Will google treat each entry as a unique page?
You need to ensure each page can only be accessed by one URL. For example, take a look at the following blog article's URL:
http://www.huffingtonpost.com/2011/06/25/rachel-weisz-daniel-craig-married_n_884653.html
Now try to access that same article with various other URLs such as without the www or with adding a trailing slash character:
http://huffingtonpost.com/2011/06/25/rachel-weisz-daniel-craig-married_n_884653.html
http://www.huffingtonpost.com/2011/06/25/rachel-weisz-daniel-craig-married_n_884653.html/
Notice that when you try to remove the "www' the same article appears but the site's redirect works and adjusts the URL by adding the "www'. Does your blog article redirect itself in this manner? Or does it display for both the www and non-www url?
Another example is the trailing slash. In this case the URL is adjusted and a question mark is added. If you View Page Source you will see there is a canonical meta tag which ensures the correct version of the page is consistently used by search engines.