What do you suggest if my friend only has 1/8 of her liver that is functioning, she also has hep c and a family trait of liver problem?

Treat HCV, close f/u. have her work closely with her hepatologist. get her HCV treated, and manage whatever the hereditary condition is. if she's in her 30s as well may need a transplant evaluation at some point soon... (no medical quantification of "1/8 liver working" btw... liver function tests a lot more predictive in terms of prognosis.)