Right now, I'm using an AC Adaptor with an output of 5V and 1000mA. Is that enough current, or should I get a new power supply?

This is my first time posting here, since I am a new Raspberry Pi user. :) I recently got two Raspberry pi boards, and I have been trying to get one to work. I've scavenged parts to plug in to the board, and everything seemed to work except for the keyboard or mouse. The screen loads up, and the pow...