Hi There,
I recently got my british citizenship as naturalization.
I have been living in the UK for 9 years, but on the form I put only the last five years because you just need to provide the minimum requirements for the application process.
regarding, your father's details I would use the same information that you used to obtain the passport with which you entered in the UK.
I guess, you could also leave it blank if you want but I would google a bit more to see what to do in that case.
Hope this helps someways.......good luck!