Changing the tap’s title description of site

Hello,

When I first installed wp I was going to make it for my graphic design shop but then I changed my mind so so now when you look at the site in the tab in chrome it says Graphic design shop plus the same thing for the snippet how it looks in search engines.

I changed the description on the home page but it still says the same thing in the tab. I know how to change this when I making a site in dreamweaver but not with WP I figured out a lot of things and want to replace the site with WP but that stops me, here is the original site url http://vintagetoyadvertisements.com N below is the new one that I want to make live. Thanks for your help.

URL: http://vintagetoyadvertisements.com/mcpherson/