Installing subversion is probably not the hardest part, what will be the hardest part is how you access the repository. There are many options (file sharing on the network, disruptive transmission via SSH via http-connection). Each has its own professional and console. How are you developing now? If you all use the same webroot, for example, version control will not help, since you will still change each other's files, so you will have to create separate sites for each developer.
As for the IDE, there is a lot of shell integration for Windows in the form of TortoiseSVN , which will still allow you to work with your favorite tools and still have easy access to SVN features.
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