Default Login and Password for RaspberryPi

In Raspbian distrib for RaspberryPi  by default

login is pi

password is raspberry

You can login to system via monitor by using HDMI or by Ethernet over SSH protocol, port number is 22, you can find ip address of RaspberryPi on web control panel of router or using any network scanner. By default RaspberryPi gets ip address by DHCP protocol.