Hello, i want to make a pet tracker like Loc8tor Pet Tracker, is it possible to easily do this? (with rf signals)
Yes, it is.
Yes.
You might want to reveal what your experience with Arduino and rf signals is.
Loc8tor is only really useful for finding stuff that is lost in say a small garden, range can be less than 20m.
This question has be asked earlier. Search for pet tracker, pet + GPS and similiar.