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First of all you need to get involved and Contribute via the mail list, forums, edit the documentiondocumentation, work on the issue tracker and submit patches.
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Now go read the instructions on the new committers guide. Its also worth viewing http://www.apache.org/dev.
Enabling your SVN account
Once you've got your Apache account working you need to enable SVN access; See this document for details of using svnpasswd
http://www.apache.org/dev/committers.html
Configuring SVN
You should follow this guide to setup your EOL settings.
More information
You can find more information about being a committer at Apache here.
Getting Karma in JIRA and Confluence
Mail the dev list and ask for karma for JIRA / Confluence giving them details of your username you used to register with them both. We can then grant the necessary karma so you can start grabbing JIRA issues or editing the wiki
Getting Karma in Jenkins / Hudson
Mail the PMC chair and ask for karma for Jenkins / Hudson as described here.