I have an old fashioned Stanley superstar range
it's on for the hot water all the time, and the hall and bathroom radiators are heat leak...basically never off...as that's the way it works
I have a separate set of controls for the oven so in the summer when it's not got itself up to temperature I can boost it up and control the oven, within the exacting range of cool, hot or very hot :o It usually settles itself at cool during the summer
In the winter it tends to sit at hot, so there is less oven control required.
We also have a gas hob which is great for hurrying up the kettle in the summer...it sits on the range the whole time
As far as actually cooking on the range goes, try and do as much as possible IN the oven, get pans that can be used on and in the oven, they are most efficient with the hob lids down, so thing like sausages will cook nicely on a tray (or in the pan IN the oven) rather than in a frying pan on the hotplate.
If it is anything like mine it's like an old fashioned oven with a range of temperatures from bottom shelf to top, random hot spots (mine is hotter on the left and back so you will need to get to know its habits!
My warming oven is pretty useless in the summer, but gets used for long long slow cooking in the winter.
I also air the washing off on it....I have two very big wire cake trays that sit perfectly over the hob covers and folding everything and piling it up means it is beautifully dry overnight. In the summer I do not bother with the wire racks but in the winter it gets MUCH hotter and I worry about things singeing!
I love my Stanley too!! He is noisy and could be a bit more efficient, but he just sits there, making hot water, rumbling away, making hot dinners and being warm.....when the children are home I am forever having to chase them away from the range so I can look in the ovens.