Dealership help.

Hello. i am rying to make a dealership system and i want it to be MySQL. but i cant think how to make tables in it for dealership. i mean ik how to load and create dealership but donw know how make my dealership system dynamic.
Max_Dealership_cars will be 15. so should i create 15 tables or 15 other rows in a dealership table??

Thank you and sorry for bad english.