Info about the correct TortoiseSVN version to download and install can be found here
Tortoise installs as a shell extension, so after installing it, you'll see the directories being managed by SVN when you open Windows Explorer, like this:
Right mouse on one of the directories, or subdirectories, that shows a conflict, and use the Resolve Conflicts options in SVN. An overview of TortoiseSVN conflict resolution can be found here.
Hope that helps,
Hmm, I think they made a mistake in the documentation there. To my knowledge you need to use SVN1.7
Download link can be found here: https://sourceforge.net/projects/tortoisesvn/files/1.7.15/
And also notice that most of the time you will not see the icon overlays due to the fact that microsoft in all there wisdom decided that only 15 entries are allowed in the registry. See the stackoverflow post about how to solve: http://stackoverflow.com/questions/1057734/tortoisesvn-icons-not-showing-up-under-windows-7