Just Joined, got lots of questions -help?

Hi my name is Brent Lords, and I just joined your group.
I was trying to find a language tree on ancient languages and ran across
Cyril�s site. I had some questions and Cyril suggested I directed them to
the discussion group. So if anyone knows:

1. When did the Tocharians split off?

2. When did the Italic, Celtic, Venetic, and Illyians split into different
language groups?

3. When did the Luvian and Hittites separate?

4. Do you know when the Cimmerians were established and what is known about
their lineage?

5. The Sea Peoples are one of the mysteries in archaeology. I have seen
various opinions offered onto their origins. Some say they are Doric or
Archaic Greeks driven from East Mediterranean Islands, or occupants of the
Anatolia region driven from their home by one of the above, or the original
peoples from Crete, or later archaic Greek invaders of Crete and associated
islands who were subsequently driven from their homes by one of the later
Greek groups.
What light can linguistics shine on their origins? The best known
settlements of later Sea Peoples (second wave) to become established were
the Philistines, of biblical fame. They may have also been the least
influenced by adjacent culture. For they were initially the enemies of both
Egypt and Israel. (Of course, they may have been heavily influenced later,
once they became established, by both Egyptians and Phoenician or other
Semitic cultures in the region. Also, part of the �Invasion� was by land,
along the Anatolia and Levant � so they may have absorbed populations and
cultures from there as well. )

Anyway, what can linguistics say about the Philistine�s origins?

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