Turbines vary in how their controls are setup, the following is for the PW123 fitted to Dash 8s.
The power lever controls fuel flow to the engine and therefore engine power/torque. The condition levers control the propellor RPM and feathering, and also acts as the fuel shutoff to shut the engine down.
On the ground the condition levers are at "max" rpm (1200) and the power lever is used to control taxy speed (on the ground it's actually controlling the propeller blade angle rather than engine power directly.)
Shortly after take-off the condition levers are reduced to "min" which gives 900 rpm for the props, they remain at this setting for the remainder of the flight and the power levers are used to increase or decrease engine power for climb, cruise and descent. The condition levers are increased to "max" just prior to landing so that maximum power is available in the event of a go-around.