It appears you have a Roku Simple Remote. It is an IR only remote. The code set is the standard one that all Roku-built devices accept.
Roku TVs are not built by Roku -- manufacturers license the software for the smarts of the smart TV -- and all come with IR remotes, but the IR code sets used by the various Roku TVs are different than the Roku standard one. Some Roku TV IR remotes will work on other Roku TVs (different brands), so they are not all unique, but none use the Roku standard.
If you are not going to have a network (Internet isn't critical, just a network is important) then you need a compatible Roku TV remote for your brand, probably needed from the manufacturer. Having said that, it has been reported that some universal remotes that support the TV brand (usually listed on the packaging) will control that brand Roku TV. That may be worth a shot and quicker to resolve.
Or put up a network.
DBDukes Roku Community Streaming Expert Note: I am not a Roku employee.
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Re: connect roku remote to roku tv without internet
Since you don't know where the original Roku TV remote is, are you saying you are trying to use a remote for a separate Roku device, to control a Roku TV?
Roku TVs use a different set of IR commands than Roku devices -- IR remotes for one cannot control the other. So your options for controlling the Roku TV are:
A replacement Roku TV remote
Roku TVs from these manufacturers all respond to the same set of IR (infrared) commands and so can be used interchangeably with remotes for any Roku TV in this group: Element, Haier, Hitachi, Insignia, JVC, Magnavox, onn, Philips, RCA, Sanyo, TCL, Westinghouse.
Remotes from HiSense and Sharp can only be used with HiSense and Sharp Roku TVs because they issue a different set of IR commands. Roku TVs from HiSense and Sharp themselves, though, support both sets of IR commands so they can be used with remotes from either of these two groups of manufactures.
You can often find Roku TV remotes for one brand or another, or generic third party Roku TV remotes at retailers such as Best Buy, Wal-Mart, Target, etc, or from online sellers like Amazon. Just be sure they say they are for Roku TVs.
You may also find inexpensive universal IR remotes with Roku TV codes, but be certain they list Roku TV, not just Roku.
A Roku Voice Remote
Although Roku TVs are supplied by their manufacturers with line-of-sight infrared (IR) remotes, Roku TVs can also be controlled by a Roku Voice Remote. Unlike the point-and-shoot IR remotes, the Voice Remotes are point-anywhere remotes that control the TV over wifi. They must first be paired to the particular TV they will be used with, via the directions included with the remote.
There are two models, the Voice Remote (replaceable batteries, ~$20) and the Voice Remote Pro (rechargeable with a private listening earphone jack, ~$30). You can purchase either model directly from Roku, or at the same retailers listed above for replacement Roku TV remotes.
Roku Remote App on a mobile device
This option only works for Roku devices or TVs that have ALREADY been set up and are connected to your home network. You can't use the app to set up a Roku that is not already connected to your network, but for those units already on your net they can serve as a replacement or additional remote. Versions of the app are available for both Android and iOS.
Roku Community Streaming Expert I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well. If this post solves your problem please help others find this answer by clicking "Accept as Solution.".
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