Cloakroom Toilet And Sink I Need A New Cloakroom Toilet. How Much Will It Cost?

I need a new cloakroom toilet. how much will it cost? - cloakroom toilet and sink

Has anyone an idea (I know, a plumber, there to take a first look), how much it would cost to install a toilet, sink and small radiator? I installed a small bathroom with no sink or radiator. The toilet is not installed correctly, but when dragging the string automatically fill with water, so I think there is a problem with the toilet.I wouldnt need of decoration, in fact, gas, water only.
Thank you!