Help to get online

Hello,
i have a problem i just got my ps3 for xmas and we have had internet for years so i thought i get it but i dont know how to hook up i have a wireless router and when i try to hook up it ask me for my ip address and some other numbers and i just need somebody to help me step by step which numbers to put in or what to do thankyou to anyone that has the time to help me.