1: Not sure about the WD Apps. Have you tried them? If not, read the manual, as it mentions a couple of options, including FTP (not secure/encrypt though).
Otherwise, there are a couple of other options, but more advance.
2:
http://community.wd.com/t5/My-Book-Live/GUIDE-Install-Transmission-2-77/td-p/558638
And
https://code.google.com/p/transmisson-remote-gui/
*For remote management, you will need to make changes on Firewall/router, etc…
