Use Save a Copy with the "clone" option to save a copy of your file.
Open and test this clone as sometimes, you get unexpected results when every single table is empty of records. You may need to "prime the pump" on certain layouts by creating one blank record--it depends on the design of your database.
Email the file to your customer. If they have already installed FM GO on their iPad then need only use the "open with" option to open the attached file with FIleMaker Go to copy it to their FM GO location on the device.
Depends. What version of Filemaker are you using?
FMP advanced 13
FMPA 13 will work perfect. Just follow PhilModJunk advice above.