controlling/modifying webView...?

I have a few questions regarding webView. I am a reasonably new developer so if you could keep the answers in layman's form that would be greatly appreciated.

1) I'd like to use a loading screen when loading the first webpage in my app. What is the best way to do this but have it go away when the webpage is loaded. I found something about estimatedProgress on apple's site, is this the best and how do I implement this?

2) What is the most simple way to know when the user clicks on a link in order to count the number of links clicked?

3) Is it possible to cut out the bottom 20px or so of a page if it has undesirable content that i want gone?

4) Is it possible to turn off certain links?

5) Can someone explain webFrame vs webView?

6) Should i have a separate view controller to control all of these things or should i just code in mainViewController?

I'm sorry there are so many questions but any help at all would be great. I am a young new developer trying to improve in Objective C and hopefully you can help.

 

Thank's for the help, I'll look into that.