Hello. I've addressed most of your points inline below. Hope it helps!

- when I add content to a page, it appears on all pages how do I fix?

>>Your theme might be using global areas, these display sitewide. You'll want some of these for sitewide components like logo, for other page specific sections just call area('area_name') in your theme.

- I can't add a layout block

>> Not sure what you mean here. Layouts aren't blocks, but you should be able to create a layout in an area and add blocks to that.

-I also have a ton of images and pdf files is there any way to separate them for they are easy to find?

>> Use filesets - like folders but not folders. You can filter and search on fileset in the file manager.

-I need to set this up for someone who is not computer literate. How can I set up the dashboard so they only see certain items.

>> Permissions, you can control just about anything a user can view/edit in concrete5.

-when its all said and done, do i "move" the site live (so it's not in the dev folder)

>> That will depend on how you're site up in dev but (assuming linux 'live server') the process is generally to perform a mysql dump of the database. Create new database and user on the live server, import your dump. Copy your concrete5 filesystem to the live server, and assuming you've had to change dataebase name, user and password and perhaps even server location, provide the new values for the live server in config/site.php

Best

Ollie