If you are new to recording, and looking to buy recording gear, look into (at least) a two channel audio interface with mic preamps, and 1 or 2 shure sm57's. This will allow you to start micing up and recording your guitar amps, and a few other things like vocals. you can record bass guitar direct with the preamps. If you want to start recording acoustic drums you will need a lot more mic inputs and mics. You can probably get away with some programed drum samples just to make some rough demos/ideas.
Don't count on anything sounding better than shitty demos when you start out. Getting a good sounding recoding takes a while to develop your skills, so be patient and open minded, and NEVER act like you know everything there is to know. The producers that talk about how good they are almost always the ones that don't have mixes to back it up, while the good ones let their productions speak for themselves.