Nothing. The service is free of charge.
You need a smart card, a smart card reader (including software) and the Online Filing software itself.
You can order your smart card via www.epoline.org under "Enrol for a smart card". You will be sent a starter kit consisting of a smart card, reader and software. You should check for the latest updates on our website and apply them immediately, or enable Live Update after the installation and apply all available updates.
No, this option is not available yet.
With the Online Filing software you can file the following documents with the EPO: EP (EP1001E2K) and Euro-PCT (EP1200E2K) applications as well as subsequent actions including appeals (EP1038E), PCT (PCT/RO/101) and EP(Oppo) documents with the EPO. You can also file national patent applications (DE, FI, FR, GB, NL, PL, SE, SK, and so on), EP1001 and PCT/RO/101 with the relevant national patent office.