You can request a page move by adding Template:Move at the top of a page Like this, for example:
{{move|Rubber (IndustrialCraft 2)}}
Regular contributors have the ability to move pages themselves.
If you check the Toolbox in the top bar, every page has a "What links here" page, e.g. for Rubber: Special:WhatLinksHere/Rubber so you can see all links that have to be changed.
Usually when you move a page though, the old page will become a redirect to the new title. (if you change "Rubber" to "Rubber (IndustrialCraft 2)", then "Rubber" will redirect to "Rubber (IndustrialCraft 2)". so the links will still be intact)
In regards to creating new pages... yeah, that's sorta just how you do it. It seems we need a better help section though. I will try to work on that.