Google Ads customization

Hi, I would like to include advertisements in my right sidebar. 1. How do I do include Google Ads? 2. How do I change the size of the right sidebar, so that it adjusts to the size of the ad, which should be 160px wide (therefore the main content on the left would get more space) 3. What should I do if on some pages I don't want a Google Ad in the right sidebar, but a different ad from an affiliate partner? Thanks!