1. Install from epel.

  2. Example guide at http://idroot.net/linux/install-transmission-centos-7/.

  3. Where are the transmission-daemon config files?
    See https://github.com/transmission/transmission/wiki/Configuration-Files

  4. Running Transmission on a headless machine.
    See guide on https://trac.transmissionbt.com/wiki/HeadlessUsage/General.