Questions regarding uninstalatio of WoW (Patches and account info?)

[ZurAlQaNif]

I have been unactive from WoW a while now and want to uninstall the game for the moment.
To make sure that I keep everything that I will need to play again when I reinstal the game some time I need to know what is essensial to play the game on a later stage.

Patches
Under my WoW folder I got several folders and files that I am woundering if I should take backup of or if there is no need for it.

Folders:
WoW-1.12.x-to-2.0.1-enGB-patch
wow-patch
wow-patch (1.10.2.5302 - 1.11.0.5428)
wow-patch (1.11.0.5428 - 1.11.1.5462)

Patches
SUBFOLDERS
WoW-2.0.0-to-2.0.3-enGB-Win-patch
WoW-2.0.12-to-2.1.0-enGB-Win-patch
WoW-2.1.3-to-2.2.0-enGB-Win-patch
WoW-2.3.3-to-2.4.0-enGB-Win-patch



Files:
WoW-1.6.1.4544-to-1.9.0.4937-enGB-downloader.exe
WoW-1.6.1.4544-to-1.9.0.4937-enGB-patch.exe
WoW-1.9.2.4996-to-1.9.3.5059-enGB-downloader.exe
WoW-1.9.2.4996-to-1.9.3.5059-enGB-patch.exe
WoW-1.9.4.5086-to-1.10.0.5195-enGB-downloader.exe
WoW-1.9.4.5086-to-1.10.0.5195-enGB-patch.exe
WoW-1.10.2.5302-to-1.11.0.5428-enGB-downloader.exe
WoW-1.11.1.5462-to-1.11.2.5464-enGB-downloader.exe
WoW-1.11.1.5462-to-1.11.2.5464-enGB-patch.exe
WoW-1.11.2.5464-to-1.12.0.5595-enGB-downloader.exe
WoW-1.11.2.5464-to-1.12.0.5595-enGB-patch.exe
WoW-1.12.0.5595-to-1.12.1.5875-enGB-downloader.exe
WoW-1.12.0.5595-to-1.12.1.5875-enGB-patch.exe
WoW-1.12.x-to-2.0.1-enGB-patch-downloader.exe
WoW-2.0.3-enGB-downloader.exe
WoW-2.0.4.6314-to-2.0.5.6320-enGB-downloader.exe
WoW-2.0.4.6314-to-2.0.5.6320-enGB-patch.exe
WoW-2.0.5.6320-to-2.0.6.6337-enGB-downloader.exe
WoW-2.0.5.6320-to-2.0.6.6337-enGB-patch.exe
WoW-2.0.6.6337-to-2.0.7.6383-enGB-downloader.exe
WoW-2.0.6.6337-to-2.0.7.6383-enGB-patch.exe
WoW-2.0.7.6383-to-2.0.8.6403-enGB-downloader.exe
WoW-2.0.8.6403-to-2.0.10.6448-enGB-downloader.exe
WoW-2.0.8.6403-to-2.0.10.6448-enGB-patch.exe
WoW-2.0.10.6448-to-2.0.12.6546-enGB-downloader.exe
WoW-2.0.10.6448-to-2.0.12.6546-enGB-patch.exe
WoW-2.0.12.6546-to-2.1.0.6692-enGB-downloader.exe
WoW-2.1.0.6692-to-2.1.0.6729-enGB-downloader.exe
WoW-2.1.0.6692-to-2.1.0.6729-enGB-patch.exe
WoW-2.1.0.6729-to-2.1.1.6739-enGB-downloader.exe
WoW-2.1.0.6729-to-2.1.1.6739-enGB-patch.exe
WoW-2.1.1.6739-to-2.1.2.6803-enGB-downloader.exe
WoW-2.1.1.6739-to-2.1.2.6803-enGB-patch.exe
WoW-2.1.2.6803-to-2.1.3.6898-enGB-downloader.exe
WoW-2.1.2.6803-to-2.1.3.6898-enGB-patch.exe
WoW-2.3.0.7561-to-2.3.2.7741-enGB-downloader.exe
WoW-2.3.0.7561-to-2.3.2.7741-enGB-patch.exe
WoW-2.3.0-enGB-downloader.exe
WoW-2.3.0-enGB-patch.exe
WoW-2.3.2.7741-to-2.3.3.7799-enGB-downloader.exe
WoW-2.3.2.7741-to-2.3.3.7799-enGB-patch.exe
WoW-2.3.3.7799-to-2.4.0.8089-enGB-downloader.exe
WoW-2.4.0.8089-to-2.4.1.8125-enGB-downloader.exe
WoW-2.4.0.8089-to-2.4.1.8125-enGB-patch.exe
WoW-2.4.1.8125-to-2.4.2.8278-enGB-downloader.exe
WoW-2.4.1.8125-to-2.4.2.8278-enGB-patch.exe

If I take backup of these will it save me time when I reinstall the game again or will this not have anye effect?

Personal
What about personal information?
If I reinstall ofc. I would want to play with my old char.
Do I have to take backup of anything in my WoW folder to make sure I can play with my character again?

[Khabs]

You can just back up the entire folder or when you come back to wow, just get the Wrath of the Lich King DVD and whatever patches have been released since then. As far as the account, you don't need to save any files unless you had addons that you wanted to save the info for.

[Lothaer]

all your character info i saved server side not client side, you can completely delete your WoW folder and do a fresh install, once you are finished patching and log in ALL your characters will be there.