Is there a certain score I need in order to pass VCE and gain my certificate?
As long as you satisfactorily pass 16 units of VCE (including Units 1/2 and 3/4) including a 3/4 sequence of an English subject (English, English Language, Literature, EAL), you will gain your certificate in VCE.
This translates to completing 4 subjects with their respective 1/2 and 3/4 sequences.
There is no ‘pass’ ATAR for VCE - if you meet the mentioned requirements, you will gain your certificate.