hi I've bought a used 2950 Switch. I want to change it's configuration to the cisco's default configuration as a NEW 2950 is. What must I do?

thanks for your answer the second way is suitable for me 

Hi I have got a 2950 device, and I set fast ethernet 0/1 to 0/2 on Vlan 2 and fast ethernet 0/3 to 0/11 on vlan 3, and fast ethernet 0/12 is a trunk port.how can I telnet to my device? I have not any Vlan1 ports for telneting!!