Linking two routers together?

I live in an old house and I need to move my router because of the walls its interfering with internet signals to my room, but I only have one long cord and my modem plugs into the router and then my main computer plugs into the router and doesn’t have a wireless card so I can’t make it wireless. So I wanna just plug my router into another router and move the second router to my living room. So from what I read I just have to disable the dchp on the second router, but do I have to install the router onto any computers or plug it into the modem or can I just use my wireless internet and plug into the second router and change the setting? I’m also not sure what the default the IP address is for the Belkin router is to get to the router setting website, is there anyway I can find it? FYI I’m plugging a Belkin into a Linksys router.