Google advertisement

Hi
In my site i would like to have google advertisement in this manner:

a) Every time i create a page content, i need google text advertisement to appear in the down of my page content.
Some things like this: Google Ads: Animal Ball fruits

b) The second type of advertisement i would like to display is again the text but in the block... It means a set of google advertisement in the block.
Some things like in every sites we can see the advertisement in the right side bar

c) the third type of advertisement i would like to dispaly is only the google image advertisement in the block again.

so can any body throw some light on this above topic. how i should process and the module to undertake...

looking for the help