If you have lots of question marks in the device manager then you need to install the correct drivers. You need to see a list of devcices in the device manager with no question marks nor (worse still) exclamation marks.
I also think you do not need to configure the router since you did not rebuild this. Once you install the network card drivers your network card will pick up an IP address, subnet mask and gateway from the router and you will get onto the internet easily.