Hi,
I would like to assist you on this. First I would like to know your network design requirement and setup. Below are some links which may help you
http://www.cisco.com/c/en/us/td/docs/security/asa/quick_start/5505/5505-poster.html
http://www.cisco.com/c/en/us/td/docs/security/asa/asa84/configuration/guide/asa_84_cli_config/interface_start_5505.html
http://www.cisco.com/c/en/us/td/docs/security/asa/asa84/configuration/guide/asa_84_cli_config/route_overview.html