I am going to Hajj inshaAllah with my parents to perform Hajj and to help them also, they will pay all the expenses, would this Hajj count for me ? do I need to do another Hajj with my own money when I get older? Jazakum Allah Khair.

All praise be to Allah, and may his peace and blessings be on the last and best prophet and messenger, Muhammad. This hajj counts for you, and you do not have to make another hajj. Allah knows best.