Not starting....does it turn over (try to start). Or is it just clicking. If it's clicking your battery is dead. It needs to be jump started. If you turn the key & get nothing....the battery is dead.
If these 2 suggestions fit the symptom call a friend & go to an auto part store then buy a pair of jumper cables. Ask them (an employee) how to use them if you've never used them before.
good luck.