A few questions, Please help!

[Uaellaen]

1. Even though Secrets of Faydwer and SoD are cheaper to get,
i was told the Titanium Client is the best bet. I've secured
a used copy from a friend but he says he has registered the CD key.
DO i need the CD key to play the Project 1999 server?
will the game even let me install it after the CD key was used?

Dont need a CD key, the game installs without key.

2. I remember first starting a Human Cleric with "Rodcet Nife"
as a deity in Qeynos. Immediatley talking to my guildmaster
i was able to do "ARMOR" quests and get a few peices of cleric-only
armor provided by the guildmaster. Are quests like that still in the game
for newbies who want to get armor without spending a lot of money?

There are some quests that weild armor for clerics in the solro temple etc. althou the quests i think you are reffering too were added way later ....

3. Since it emulates EQ in the year of 1999, before all the expansions,
does this means alot of races (Iksar, Vah Shir, Froglok), Classes (Berserker)
and zones (Lake of Ill Omen, Velious Zones) aren't available?

yes it does mean exactly this ...

4. Are the Luclin Models available?

No