Yes and Yes.
To pair the Evo 1, plug the pairing pin into the phone socket of the Evo and power up, then after 4 seconds remove the pairing pin. Now do a search for bluetooth devices, when you find the Evo pair with it (think it's 0000 to pair), once paired select options on the Evo connection and set to authorise, this will connect automatically once the Evo is on and the phone is in range. If you leave the pairing pin in until after the pairing procedure it means you don't get the annoying beep every five seconds in your headset as the Evo searches for the phone.
To set the phone to auto answer find your accessories or enhancements, select headset and change to auto answer.