Well where to begin.
There are three ways you can get the codes for your vaious components into your Pronto.
1) The built in database that came with your TSU3000 and editing software
2) Codes posted in the files sections of the Pronto and ProntoNG forums. Look in the "Component Configuration Files" and "Descrete Hex Code" sections to see if your components are listed. If you find them in the Pronto forum the most likely will be in a ccf format which is an older version not used on the TSU300 however you can still use it by doing an import into your Pronto Editing software.
3) "Learn" the codes into the Pronto from your existing remote controls (assuming you still have them). Personally I find this the fastest and most accurate way if importing my commands and only use options 1 0r 2 if one of my learned commands does not work or I need a descrete code.
On backgrounds you can have a default background for all pages or if you wish you can have one for each component.
On Buttons the only limitation is your imagination. The layout of the buttons is not dictated by the piece of equipment you are trying to control. You design where each button will go and what it will look like. I would suggest you start by looking at others that have posted complete config files and see the various layout styles to give you an idea of what can be done. Some of them are truly incredible. Expecially the colour ones for the TSU700, not that I regret my TSU300 but dam this stuff looks good in colour.
As a newbie myself (I have only had my Pronto for 4 months) when I first unpacked it and readt the user guide and tried to read through the help screens in the editor I found it to say the least unclear and confusing.
Others at Remote Central put me on to a user guide that was written by a Pronto entheusiast and organizes all the tasks required to configure and operate your Pronto into a very easy to follow tutorial. It saved me countless hours trying to learn how to program the device.
The guide is about $20 and can be downloaded at
www.prontowizard.com.
Good Luck