Hi,
1. Yes
2. LO method was like that, Full or init with data always gets data from setup tables.if you search on google about setup tables purpose you will know.
3. info package (FULL) will get data by running extractor ?
Yes, while runng info pack, cmod code also execute, enahanced feilds data you can't see at setup tables. but you can see at RSA3 only. enhanced fields won't be part of your set up tables.
Thanks