Since you were a 1.0 player, please check your email. You ask very good questions, but I'm not sure if we can publicly answer them yet. All 1.0 account holders have PC Beta 3 access...not only that Phase 3= 1.0 character port. So all your questions can be answered by trying it out. Below is some information I found via google, I know it doesn't answer your questions directly... but it's a start. (PS the info is a little outdated, but still relevant to what you need to know)

Beta testing will begin in the middle of February 2013.
FFXIV Legacy Members will receive a free pass into beta phase 1.
FFXIV Account holders will receive a free pass into beta phase 3.
and
Phase 3

Phase 3 begins 1-2 weeks after phase 1 ends and will last 1-3 weeks. The purpose of this test is for version 1.0 character import testing, which means players will be able to use their V1 character. This will also be the first time in the beta that players are able to visit Limsa Lominsa and Ul'dah and their surrounding areas. Free companies will be added along with limit breaks and materia crafting. On the system side this will be the first time data centers are available outside Japan. There will be over 20 worlds available and the level cap may be increased from 35 to 50.
Link to info: http://www.ffxivinfo.com/beta.php