Here would be my get started list:
Recording for Dummies book, the Internet is nice and a LOT of great information on this board, but it can be overwhelming.
I think Pinky makes a lot of sense, probably one person will take on the effort, bit sort out who buys what and someone will have to take the lead. Probably you, but make sure it is known upfront.
My list of decent equipment:
-Nice little laptop for your DAW if you are going to mix and not use much effects (main ones are Compression, EQ and Reverb).
-DAW - I usually recommend Reaper, but find one you like
-Interface - To record a band, I suggest something like a Tascam 1800, probably can't find one, so look for the US 16X08. It doesn't have to be that one, but it is pretty straight forward and gives a lot of flexibility.
-Mics 4 for the drums (Dynamic for the Kick and snare, 2 condensers for the cymbals and the rest of the kit.
-Dynamic mics for the amps X3 (these can be condensers, but they don't have to be)
-Mics for vocals
Now, that is the easy part, next you are going to have to figure out how to monitor. The main issue there will be vocals. If you are using a PA, then you will need to figure out how to get the vocals through the PA and the interface. If the PA as channel outs, then you can run cables from the mixer to the inputs of the interface. Monitor live. If not, then you will need some sort of head phone amp and headphones to monitor.
That will get you started. But I can tell you right now, and to everyone's point, my list will only create more questions. But I thought I would at least give you a good start, then it will answer why no one else has, because I really didn't help you as much as the others did, except for the book suggestion.