I visit this site: https://www.google.com/intl/en/ads/. You should find what you're looking for there.
Read up on Google AdWords, there's plenty of information. Just be careful of what you're allowed to advertise and promote on AdWords. You can get banned very easily.
When you sign up try to get the free 'credit' Adwords usually gives to new customers. If you don't see a credit available, try searching Google (on the Google search engine), then click one of the top blue ads for Adwords that indicate free credit is available. You'll still need to sign up using a credit/debit card...
Check this site out: http://adwords.google.com/support/a...rintable=1&page=examstudy.cs&format=inproduct This will answer all you questions about adwords and how to start running your campaign. It will also explain to you how to create ads that will bring in the right customers. Good Luck!!
Yeah visit the link that all the above users have posted! Google makes it totally easy and pain free to start a campaign! I wish you the best!