Get quick traffic estimates for new keywords without adding them to an account or using the AdWords sign-up wizard.
if you use the Google keyword tool or the beta version that they are now featuring, you can get your estimates there. Hope this helps.
It’s a good question & one that many people want to know before they start. Well, when done properly, AdWords is never an expense, but instead it’s an investment which returns more than you put in. In terms of actual cost, there are two things you need to pay for : Clicks - you’ll pay Google for the cost of each ‘click’. Of course, because the system is a ‘pay per click’ system, you only pay for that click when someone searching the web is sufficiently interested in your Ad to want to click it! The rest of the time your Ad shows, you pay absolutely nothing.