Google Search

Hi I have set up my website http://www.whitehallpost.co.uk and when i do a search in google for : Whitehall Post, the first two listings it it pulls up are: http://www.google.co.uk/search?hl=en&q=whitehall+post&meta=

the first one has a title of bluehost, because i have a bluehost advert as a banner on my website.

the second one has in the title: ‘hello world’ which was the default post for when you start your blog, but i deleted this default post from my dashboard.

basically how can I change what the titles and content of each listing in google searches please?

thanks
Josh