Welcome Katieanne,
Have you hardwired to the router and set up your laptop with the password for the router ? You need to access the Internet through the device being used by the " local " area you are in, as an example, if you are at your home , you have to use the password as it has probably been set up with one and you have not been told what it is or your mac addy is being blocked . Post back with more info. so i or others can assist you in more detail please.