Automating SQL scripts in Toad for Oracle (13.1)
DBMS_SCHEDULER is your friend https://docs.oracle.com/database/121/ADMIN/scheduse.htm 
  and  https://oracle-base.com/articles/10g/scheduler-10g – Philᵀᴹ Oct 21 at 19:11


Also, I recommend you use SQL Developer instead.  That software has a GUI interface for creating the scheduled jobs to run.