Browser Timezone & Privacy Concerns

How can I hide my “timezone” from sniffing sites?

From my understanding, websites can access both the timezone of my browser (without using javascript) and the timezone of my local machine (using javascript). my question being

• If a website has access to my local machine’s timezone, does it mean it has access to other information on/about my local machine?
• According to Privacy - How can I hide my “timezone” from sniffing sites? - Super User, we must disable JavaScript to block timezone access. However disabling javascript is not really feasible as it breaks most of websites. Is there a workaround that allows us to block JavaScript from running specific commands?
• Maybe my understanding of JavaScript is incorrect, but if a website has the privilege of running any program on my computer through the web browser, it can retrieve all the information it needs. If I don’t disable JavaScript while using the browser, I don’t see the point in resisting fingerprinting, like spoofing my device info.

appreciate any help!