Most of us do not understand those Chinese/Japanese (?) language..
Best would be to post your question in English..
I tried using google.translate.com to get your question, hope the aswers do fit
1) Yes, if the invited person does not yet have an account, it may create a Freemium account. But attention: If the invitees mail domain is claimed by another (paid) organization, the new account may be also created in there or the account creation may be denied.
2+3) Spaces are seperated from meetings, ie. space moderators do not need to have a meeting license. If a space member is deleted, it will also be removed from the spaces it was it. Organization Admins may use the Webex API to promote/add other users as moderatorsin case of all moderator accounts are unknown. See also https://blog.webex.com/team-collaboration/moderating-spaces-in-a-team/ for some more information about moderated spaces behavior
4+5) https://help.webex.com/n8vw82eb/ https://help.webex.com/uxg1zl/
6) You may either copy the meeting information to your mail client or you may add all participants manually to the meeting.
7) This was not understandable in the translation. I think data privacy etc, may be good search terms in the Webex help
