wordpress

I have been looking at many different wordpress themes but don't know which ones are good to use on my website that will have also some marketing advertizements on it. Is there some that are better for this or where can I get some good ones for this purpose?

Hello friends. I am wondering which one will get more traffic for a website. Wordpress free version or paid version on your own hosting? Does this matter or is it just what is on the website? I can not find a good answer in a search. Some say one and another says the other one. Thank you