Google TakeOut

Is it possible to export the data of one service only?

YES, it is. Google TakeOut asks you to select the service, and then it lets you choose which and how many data to export.

Does TakeOut delete my data from Google?

NO, it does not. TakeOut creates a copy of your data without deleting them from the Google servers.

How long does the procedure to export my data take?

The export procedure depends on the amount of data in the account and takes from a few hours to several days (even a week).