I'm thinking of getting AdSense but I have a few queries:
-Is AdSense entirely free?
-Can Google access any of your information?
-How much, on average, do you get per click?

Thanks,

MiniK

-Is AdSense entirely free?
Yes.

-Can Google access any of your information?
Like what ? Please be a bit more specific?

-How much, on average, do you get per click?
Depends on the competition of the advertisers trying to bid for ads relevant to your content + the location of the visitor + many many other factors. For a HIGH demand keyword like "Web Hosting", Imagine to get paid upto a max of $2-3 per click and min. of $0 too ;-)

questions 1 and 3 were answered. as far as #2....ofcourse they can and they do. first, when you sign up for adsense, you give them your personal info including your address to mail the checks. online, they gather at the very least your website content in order to put relevant ads on your site as far as other personal information, i wouldn't be too surprised. they keep track of ip's for sure since they will ban users from clicking on their own ads and friends who click on your ads just to make a couple bucks.

is it safe? if it wasn't, people wouldn't be using adsense and it would be the talk of the town. i don't think google will try to do anything that might ruin their credibility. if google gets sold, then i would be cautious.

all in all, don't sweat it. it's free aside from the time to put the code on your site and set up which ad formats you want and you make a little money. i do believe they charge a chek proccessing fee though too(when they issue out your check for the earnings you have accumulated)

and depending on your webpage content(you don't choose the ads google places on there) you earn from $0.00 per click to $10.00 per click or higher. the way they pay is still a mystery to everyone. there is no definate answer to that last question.

i think i was averaging .05 a click when i had adsense on my site that had to do with pets. the webhosting, porn, casino, insurance ads pay a whole heck of a lot per click though. so do some other ads. what you get paid has to do with the competition of ads placed through google adwords and how high the bid price is for that particular ad. not so much based on the highest position of the ad(the highest ad position can sometimes be cheaper than what someone is paying for the 2nd and third position believe it or not...)