As long as `has_more` is set to `true` there is more data available. You can get this data by increasing the `page` parameter in your request subsequently and running new request with that changed `page` parameter.

The next url for your example would then be

    https://api.stackexchange.com/docs/users#page=2&pagesize=100&order=desc&sort=reputation&filter=default&site=stackoverflow&run=true

The other both properties `quota_remaining` and `quota_max` refer to the maximum amount of queries you may issue on that day to the API. In your example case you have used 46 request on that day and may do another 9954.


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WRT to the later comments

You can add filters to your request in order to have some more fields shown or left out in the response. In the adhoc query form you used, you can access these filters on the top right of the respective form.

![Filter form][1]

There just select `edit` and search for `total` in the section `.wrapper`. Afterwards click save. Afterwards it should show a filter id like `!-q2Rj6nE`, which is appended to your queries.

However as the FAQ states [here][2], the `total` field is a rather expensive function and should be avoided to use on a regular basis, when you retrieve items anyway.


  [1]: https://i.sstatic.net/0CAWQ.png
  [2]: https://api.stackexchange.com/docs/paging