You can create custom error pages, yes, and hide the server your using. However, its not completely hidden; the server header will still give it away. (That can be turned off though... not sure how -- I don't use Apache that much.) As for the claims in post 9, you don't need knowledge of how to forward ports, or advanced knowledge of Linux, to get TT going. You do need that knowledge if you want to secure the server. (Unfortunately, TT is insecure by design, so people can still sniff traffic and get login details and such, and you have to pay to get it secure -- and there's no information on what security they use, other than the fact that they use TlS, supposedly.)
"On two occasions I have been asked [by members of Parliament!]: 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out ?' I am not able rightly to apprehend the kind of confusion of ideas that could provoke such a question." — Charles Babbage.
My Github