I'll attempt an answer, since none of the 147 other readers of this topic have!
I also have a 2 bed apartment, my electricity bills for the past year have been IRO 2,500 TL, water approx 35 TL / month & 1 gas bottle, the last of which was just over 100TL. So, in total, just over 3,000 TL pa.
Last winter, although very wet, was comparatively quite mild & my 3 months of winter electricity bills were each IRO 400 TL. Electricity is my only source of heating, but all my rooms are self contained, so I only need to heat one & the heat doesn't dissipate elsewhere.
I don't use the immersion at all, as I have a dishwasher & had an electric shower installed, (which I don't need to use every day) when I moved here. Carpets go down everywhere for the winter months & I draw all 3 layers of curtain at every window too.
Hope that gives you a rough idea