Finding out my own network key?

My wireless connection runs normally. I have one desktop PC and one laptop which connect wirelessly.

Now I'm trying to get a new laptop to connect. At the bottom right corner of the screen, it says that I'm connected and the signal strength is Very Good. But the internet doesnt work for me.. I cant visit any website or do any internet related stuff.

This led me to think that there is a network key for my own router but I forgot if there is one or not. How do I find out if I have a network key and what are the keys?

 

What router, brand and model do you own?

 

SMC7004VWBR

Is that what you are looking for? I'm kind of new at this.