Home restoration is not an easy task, let alone an old home restoration. A lot of factors are needed to be considered before you can actually start making the improvements inside the house, but of course it is not an impossible task.
If it is indeed an old home restoration that you are doing, better make sure that you know the history of the house, especially the materials used. For masonry, tuckpointing is needed every 50-60 years. Make sure that you get to do this to make sure that the material will remain sturdy. Matching the mortar is also important on this. The color, consistency, and elevation needs to match the old ones so you can keep the old school look.
With regards to radiators, never throttle a one-pipe steam radiator. The steam and condensate have to share that confined space. Keep the valve either fully open or fully closed to avoid liquid from hammering and squirting air vents.
With the woodworks, use heartwood as it is always the most disease-resistant type of wood available. Make sure that you avoid sapwood as they are not reliable for long term.
Lastly, never be unable to fully look into all options before starting to see all possibilities.