101: Setup mics, record, listen, adjust mics, repeat until it sounds acceptable.
The drums, especially cymbals, will be louder than everything else. Do anything you can to seperate/isolate them from everything else(Fiberglass insulation, drywall, couches, blankets, loaded clothes racks, sheep,..) with the best case scanario of having them in a seperate room where the band can only hear them as much as they need to to sync up. If the drummer is having problems hearing the band give him the headphones after you've got everything sounding good and are ready to hit record. Use the 57 on the drum kit as it can handle the db levels and will do a decent job. For a one mic drum setup I like to place it 6 inches to a foot from the snare pointing between the snare and hi-toms , towards the the floor tom, just over the top of the bass drum. Coming from the opposite side pointing towards the Snare/H-hat works well also. You milage many vary.
As noted by Bouldersoundguy, everybody else will have to be captured by the C1. This will probably be difficult as, unlike in a live performance, without monitors it would be difficult to judge how your distance from the mic is effecting the recording. You will need to do one of two things. Either get a headphone distribution amp so everyone can monitor (behringer $24, +closed headphones for everybody $15+each). The other option being ducktape-- Every body stands at an equal distance from the mic and plays,. monitor via headphones,. record,. check levels,. this time the mic stays still and the players are moved closer or futher from the mic to adjust thier levels in the mix,. repeat until levels are set. When you find the sweet spot for everybody use the duct tape to mark those spots so everybody stays put. Closer is generall better as you can keep the gain a little lower and hopefully capture less room sound. Cross fingers, hope for the best.
No Audio interface: I'm not a Mac guy but I would guess that the DA/AD converters on your macs sound card are probably pretty decent, I think the real trick here is A: making sure your sound card is set properly to capture audio at least at 16 or 24bit/44khz resolution through your line in, B: keeping the output of your mixer into the line on the low side, as most PC soundcards will overdrive and clip much earlier than pro-audio equalivants. This is really just being very mindful of proper gain staging. Also, please make sure your going into the macs Line-In, not the MIC input.
Good luck!