Vpk sound mods go imto the addoms folder as usual ,just likecustom maps?
Any vpk mods would go to the addons folder, yes.
If i had a program to find the exact map name,can i add that map to start on in control panel? What software do i need to extract the vpk files if i wanted tto fimd out the map names
You can set the server to start on that map, yes. The most simple way to find a full list of map names is to first have them installed and working on the server, then use this command:
rcon maps *
The * is a wildcard to show all maps without filtering the results.
I also see 3 folders in my ftp called lfd2 lfd2dlc lfd2dlc2 lfd2dlc3
The DLC folder just contain data for extra content that was later released and should be left alone. All configs, addons, and so forth that you need to worry about will be in the l4d2 folder.