Is that possible to get timeline tweet data in json format without using oauth? and any token?
No, JSON is available in REST API, for which you’ll need an app and tokens.
Could you please let me know how can i get the token and process it to get a twitter timeline?
Sure, there’s a few steps to it if you’re just starting out, but first you’ll need to register as a developer, https://developer.twitter.com/en/apply-for-access
Create an app - and once you have it registered, create your tokens in https://developer.twitter.com/en/apps/
Then you can try to call https://developer.twitter.com/en/docs/tweets/timelines/api-reference/get-statuses-user_timeline.html or https://developer.twitter.com/en/docs/tweets/timelines/api-reference/get-statuses-home_timeline in whatever library or code you’re comfortable with.