It's much easier to implement a font taken from another ROM. For example I'm using segoe wp on endymion, which is a font from windows phone 7. If you want something like that, search the forums, it's already somewhere.
But I would also like to know if there's any way to import a font with for example an .ttf file
Sent by my fingers to your head.
HTC One / S-OFF / ROOTED
ROM / Android Revolution HD 20.0
LG Nexus 4 / ROOTED
ROM / AOKP
KERNEL / franco
HTC Saga / S-OFF / ROOTED
search & read