Re: FREE TV and I expect Free, Don't try to Bill Me!
There are tons of free channels available on Roku. Most of them derive income from unskippable ads - some of them have so many ads as to make the channel virtually unwatchable. But there are others with more tolerable ad levels, some even have fewer ads than commercial broadcast tv. To get you started, check out a few like Pluto, IMDB, Tubi, and Stirr.
Some cable-type channels make their streaming offerings available only to those who are already paying for them through a subscription to a cable/satellite "tv provider".
There are others that require a paid subscription outright.
Still others make only limited content available for free but require a paid subscription to go beyond that.
Before you start testing a bunch of them, I'd suggest you log into your account at https://my.roku.com and create or reset a PIN value. You can then choose when the PIN is to be required, such as before it will allow any subscription or purchase to be made on your account. Having this in place will assure you don't inadvertently sign up for anything that would incur a charge.
Editing to add...
But do be careful. There are lots of scammers out there claiming to be Roku that will try to charge you for support services (Roku does NOT charge for support, to install, upgrade or link your device, add additional Rokus, etc.). Be especially wary of any Roku "support" sites you find by a web search or by your browser auto-completing an URL you start to enter -- any site claiming to be Roku that does not reside at roku.com is bogus.
Also be aware that scammers can hit you with bogus charges and label them anything they like. If a charge comes in claiming to be from Roku, don't assume that it necessarily IS from Roku, especially if you have previously given your information to one of those scammers.
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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