I would argue that musicianship is the first priority, engineer is the second but what do I know.
For Rathe:
The SM57 is an industry standard microphone that covers a ton of instruments well. Vocals, guitars, snare drums, etc.
Shure SM57 | Sweetwater.com
If you want to go further than that you can pick up a large diaphram condenser that will give you a ton more detail in what you record and will sound great on vocals, acoustic instruments and room mics.
Rode NT1-A | Sweetwater.com Audio-Technica AT2020 | Sweetwater.com
Here are a lot of good interfaces. I use a Focusrite interface but Presonus, Apogee and M-Audio all make good interfaces (in the lower price range we are talking about). Buying a M-Audio interface gives you the ability to work with Pro Tools but unless you really care I wouldn't worry about that. The important thing here is thinking about number of simultaneous inputs you will ever use (if you plan on recording drums, number of microphones on single source, 2 inputs is a good way to go if your not doing drums)
FireWire Audio Interfaces | Sweetwater.com
The reasoning behind needing studio monitors is that any speaker besides them are going to have a really limited range and the response is not going to be even across all frequencies. Check them out for yourself and see what you think:
Active Monitors | Sweetwater.com
You will probably want to look at the Yamaha HS50M, Mackie MR5 and the M-Audio BX5a unless you can afford their 8" counterparts.