Can't get npc's to stay in zones

I did all this, and if I kill them they never come back, and if I #repop they never come back either. It says they was added to the database?

Need to reboot the server to see them spawn like there sopose to.

Also how do you change the actual look of a mob. For instance the default male froglok skin is that light green. I want to make a npc with the blue skin, how is that done? I have the guidebook, and have honestly been reading through the forums, but have not found alot of newbie friendly info on this.

Thats done through the texture #.....