1. The quick way: Click on the 'e'dit button as above. On the left side under 'Inserts', click on a blank space, select Delay, and chose one. Fiddle with the settings till you find what you want. There has to be a tutorial on this somewhere.
2. Again, there are numerous tutorials on this stuff man. Many will give you the basic ideas, but you must figure out what works for you by doing.
3. Autotune settings are done by what a particular track needs. If any. You just have to make that judgment based on your own experience and desires. No one can tell you what was used. Well maybe the engineer, but he would say the same thing. I used what was necessary. Or didn't.
I know you are looking for easy and quick answers man. They just do not exist. The only way for you to learn is by research and doing. Then more research and doing. Then, once you have researched and done, research and do some more doing. Seriously, this is how you will get it.