I'm not sure what you're doing wrong. It's probably good to start over slowly.
The first thing you want to do is get into the router web configuration.
You connect a straight-through cable or patch cable as they are call. If you don't know, just hold the end side by side and if the colors coordination matches then it's a straight-through. You connect the cable to a computer with a NIC card to the router, you should configure the router using a wired connection first. Then reset the router, there should be a reset button. This should turn it back to default setting which should enable the DHCP server.
Now go to Control Panel>Network Connection, here you should see your network card or if you have more than one you'll probably see two. Right click on the one that is connected to the router, select Properties, double click TCP/IP, make sure the following is selected
Select Obtain an IP address automatically.
Select Obtain DNS server address automatically.
Select OK to save.
Wait about 30 second for it to request an IP address from the router's DHCP server.
After that, open up command prompt, type in ipconfig /all show me the result.