You'll probably work both in the Arm Treasure Data console and using the command line interface (CLI). Both interfaces have advantages and you'll want to set up both of them.
You install the Treasure Data Toolbelt to establish the CLI development environment.
You are given access to the cloud-based Treasure-Data console when you obtain a Treasure Data account.
Your installation includes td-agent which is a data collection daemon.
You have the option of including more specific or robust log collecting tools: Server-Side Agent or Fluentd.