Smiley & Danny,
At the moment I don't have any BTC so I'm just using words for examples.
Say right now I'm in my Multi-bit Wallet and I have 1 BTC, and I haven't done the "export private key option" yet.
If I want to send my 1 BTC coin to another address...does it just "work"? Or does the program ask for a password/private key for the send to be complete?
Is the "export private key option" only if I want to access my coins at a friend's house on his Multi-bit software for example by using the "import private key" option?
It will work when you send it. This is because your instance of Multi-bit is associated with your private key. It will take some time to arrive- at least 5-10 minutes.
The import/export is designed for backup and, yes, to use on another device/machine/environment as in your example.