At first I have had this "missing Graph.tpu"- ... and later the "Use Initgraph"-issue too.
After hours trying (and reading some not politeful comments in the internet) I finally got Turbo Pascal 7 succesfully running (in Windows 10, x64). In summary I want to share "some secrets":
install the "TP(WDB)-7.3.5-Setup.msi" (comes from clever people in Vietnam)
make sure, that there's the CORRECT PATH to the "BGI"-directory in your program-code. For example:
driver := Detect;
InitGraph (driver, modus, 'c:\TPWDB\BGI');
(By the way: This is ALL, what's there to do with "Initgraph".)
make sure, that in TP7 under "Options" --> "Directories" are the CORRECT PATHS both to "C:\TPWDB\UNITS" and Your actual working dir e.g. "C:\TPWDB\myPrograms"
THAT's IT.
Annotations: The "Graph.TPU" (usually) is already in "UNITS" (together with "Graph3.tpu" by the way).
Hazzling around old driver's isn't needed even... :)
Just the correct paths... :)
Hope, that can help ...