How much oil do I put inside my 2015 Honda Civic?

I just got a used car from a Certified Honda Dealership.

The dip stick is plastic and I've wiped it down with a paper towel multiple times. There's some oil on it, but I need to check it again when the oil cools to get a level on it.

I'm afraid there's not enough oil in the engine because I've been smelling a burning (rubber or oil?) from the front of my car after I've driven it.

QUESTION: How many bottles of Oil should I buy and put in my engine until I can ask a professional to help me check my engine?

Could the issue be another problem?

I've also heard a hissing sound and will check the radiator after my engine cools down for fluid.

Thanks in Advanced for any insight.