I am not genius and I dont have a phd in coding or anything but I know for a fact that Wordpress is ready for search engines out of the box. The reason I am saying this is because I have another site where only have one plugin that helps with seo and have not done anything else for seo. The site gets around 50k visitors.
Wordpress is great out to the box and while there are many plugins you really dont need them. They do make life a bit easier though. Being a non coder like me usually makes a person nervous for just installing any plugin. So just that you know, Wordpress can be used out of the box and you will get a lot of traffic if you get past the 3 month mark as blogged on Bloggingniche.com
The key to getting traffic to your Wordpress site is by using tags and using the categories correctly. Dont overdo the categories and dont overdo the tags. Dont use a tag if the word is not in your article. Simple stuff can get your Wordpress blog more traffic. But its all built in.
Getting traffic to a new Wordpress blog can be done by just linking from one site to your Wordpress blog. As soon as a search engine scans that link they will go to your site.
Now because Wordpress has everything you need already built in that does not mean you dont have to do anything. Using certain functions in Wordpress will get more traffic than using it in another way. But that is for another post.