Well, when your post's ranking is up, it will help boost your page's ranking. But they are not necessarily the same... if that's what you are wondering about.

Yes, they can both rank the same.

I did a little comparison and discussion on how to choose between the two formats here: Permalinks, Slugs, Pages or Posts?

Well, not every "make money online" opportunity needs to be on Clickbank. WA has its own affiliate program, which means Kyle & Carson can be in complete control.

Kyle has criticized Clickbank:
http://waystoavoidscamsonline.com/clickbank-university-review-is-clickbank-stealing-from-its-merchants

I would not do this personally it is better to write your own to build up trust

Probably not, but check the legal stuff that would have come with the book.
Best way to do this is to write your own, but if you can't, another option is to buy a good quality PLR article or package.

You can add a plugin for this yes. Found here:
https://wordpress.org/plugins/wp-google-search/

Would I recommend it? Yes and No. It really depends on your niche and what you are doing on your website. If you are trying to make sales, then it is most likely a bad idea. Remember, you want people to stay on your website, and stay focused. If you give people options to click away from your content, chances are they will. You only have 5 seconds to catch someones eye with a Title.. then if they decide to read the article, another 30 seconds of their attention. After that? They either click your affiliate links.. another article.. or in this case.. Google Search something else from your site.

The logo I uploaded to my website is a .png

Hi!
It is possible to upload a logo but not all themes will allow it.

Try to go to "appearance" in your WP dashboard, then > "theme options" and look for "logo" within "header" for example. This is where my logo options are.

If your theme doesn't have theme options it may not allow you to customize your theme much but try "appearance" > "customize" and see if there's anything within "header" that allows you to add a logo.

If you can't add a logo through your theme options it might be possible to do it but I suppose it would require a little bit of coding. I'm sure someone will be able to help you out if that's the case!

Sarah