1. Not sure as I've never even thought about it. Are you trying to program something using SEEC? I'd think you could get your answer from Gtac.
2. To get files and metadata you are best to use TC export with a PLMXML closure rule. I don't think SEEC provides this function for both files and metadata. To just get files out only, you could just get the files from the cache folder after you've opened or downloaded into the cache.