Hey John,
Not sure what you mean by "New Player Package". Do you mean our background fluff, stuff to help new players start (such as our New player GS donation drive) etc.
Buy backs require Goblin Stamps. You will also receive 30 GS for coming out to NPC the Dungeon Run.
From your start date you can purchase back up to 3 months of events previous. Since you started in February, this means the January Masquerade, December Tavern and November weekend. Each Tavern/Masquerade requires 30 GS to buy back and the Weekend event would be 60. This is a total of 120 GS. As well, members can have a "Monthly Blanket" of XP (basically it's another Faire Day or single day worth of XP.) Each blanket is 30 GS. This would be a total of 90 more GS. So for a total of 210 GS you can buy back those events and gain some extra XP for your character.
There are a few caveats though and we can talk about them when you have some time.
Hope that helps!