It depends. Sign up for Adwords and find out. You general bid on key words based on or against that of which others are willing to bid. The higher the bid, the more you pay.
If you own your own business, you will probably need a consultant or professional if your asking a question like this. If you are asking this question as an entry level affiliate marketer, spend the next few weeks or months researching before jumping in. The answer will be more clear
Basically, if your website is optimized for the keywords you choose (keywords in title, meta tags, and throughout your content) Google will start you off with a minimum bid of about $.10 or $.15 a click. Adwords has something called "Click Through Rate" or CTR which is the percentage of clicks you get per 100 impressions. If you can maintain a good CTR you will only have to pay $.10-$.15 a click. If you can't then Google will slowly move you up until you have to pay $10.00 a click for that keyword. Make sure you get everything right the first time because Google will remember your past CTR and you'll have to buy a new domain name. Unless of course you want to pay $10.00 a click.
It depends on keywords you bid for, account history, ctr, landing page quality, competition. Google has a magic algorithm to calculate that.. and for some reason, for me it never ends with a .1 or .05 result Did that help?
You must have one heck of a CTR to be able to get $.05 or $.01 a click! Except maybe the content network but whenever I bid that low I don't get that many impressions.
If you goes to DownLoop , as lots of newbees, your bid can raise 1$-10$. So make for campaigns landing pages related to keywords , and make REAL ads, where describe all info about proposition. Don't set tons of keywords, just related to campaings, otherwise your CTR an QS become poor and bids get high
I suggest you go on over to the adwords learning center and devour every bit of information you can. You do not want to jump into the adwords game uneducated