Numbers?? You need to ask yourself...what in the world would a guy who inspects homes know about $$ amounts to fix something when every home is different. I have been an inspector and a builder for 25 years, and even I do not give out best wild A$$ guesses.
An Inspector is there to give you information on what updates you may need for saftey reasons, and what is wrong "In their professional OPINION" with the home. All Inspectors have different opinions concerning what they find due to their experience levels.
Ok, soapbox is broken, on to what you should do.
Get some folks out there who actually fix these issues and get the real $$$.
A basement company to fix the leaks from the outside,
A plumber for the pipes, and water heater.
An HVAC company for the Furnace and ductwork.
Compile those ##$$ and get a real world quote on what you are getting yourself into. Only you can protect your biggest investment by doing your homework, and an Inspection is the first part of that.
Good luck, I love old homes, just remember they are a constant maintinence issue and cost more to maintain overall.
But they have great Character!!