If you have the eVic VTwo mod, then it has a black toggle switch on top (+) is right (-) is left; to get into the different settings press fire button 3 times, the top item should flash, where you can go through the different coil settings using (+) choose VW if it is not already set to that, to alter the wattage press the fire button 3 times then the (-) until the wattage is flashing the you can alter that setting, always use (+) first even if you want to reduce the wattage because (-) always goes to the next item unless (+) is used first.
The coils that come with the Cubis are either SS316L (Steel (SS)) or Kanthal so can be used in Power mode (VW)
Nickel (Ni), Titanium (Ti) and SS316L can be used in temperature control mode, TCR is just a way for other metals that are not catered for to be used in temperature control mode (NiFe52 (52% Nickel 48% Iron)& Tungsten (W)), you'll have to read up on temperature control before you get into that though