I do alot of posts for products and my question is, does it help or hurt to use the company name in the title of a post. So if i am doing a post on vegetarian shoes by evolution, does it or will it help for SEO, to list the company name on the blog post title? or should i leave it out of the title?
Well go ahead and do it ONLY IF you are sure your site has a good backlink status and some authority. Reviews/Questions/Surveys for your company will definitely show up in your serps but they won't outrank you if your site has proper uniqueness.
Otherwise it will hurt to do so? My blog is new, it has no PR, yet. So when talking about a product, i should NOT use the shops name in the title, correct?
For the moment, yes. But after 5-6 months you will have some authority if you keep on building on that blog and get natural traffic, then you can do whatever you want and it won't hurt your serps. I did a tiny experiment on serps its right here read up on it, its quite amusing.