1.
Tech = TEC
Psi = Advent
Phase = Vasari
2. I answered that is post 1. There is a NormalStart and QuickStart template for each race in the GameInfo\GalaxyScenarioDef.galaxyScenarioDef
item "Tech:Module:FrigateFactory"
remove the FrigateFactory line and change the items count.
3. No. There is a build radius in the structures entity. That might effect how far from the planet or other structures but thats all.