I am going to appear for elitmus test on 14th October before this I never gave elitmus test, so my question is “can I apply for jobs on elitmus portal before having pH scorecard…?”

Yes you can apply to any of the jobs mentioned.
But company reviews your complete profile and then only they will shortlist you and without a ph score no company will shortlist you.
In short it is necessary to give ph test in order to get shortlisted.