The serial number is 1811GTC004030A02153 and need IP address cause I don't have remote and have to use app but manually set up wifi. Please someone help. Are there any buttons on TV that can select English
Sorry, but you need a remote. Your TV doesn't have an IP address until it's connected to your network, so there's no way to use the app. See this thread for suggestions:
You can find 3rd party universal remotes that may work and possibly cheaper than a genuine Roku remote. You can find them online and many stores like Walmart, Target, etc...