Stroller and car seat

Johnna
This should my first baby, however, my sister has has two already. Our car seat we have is from her. Everything we have from crib to swing are all hand downs even clothes. I been wanting to buy something for my daughter myself and everyone looks at me and says you don't need too you already have it. I really like the urbini Omani 3-1 travel system. What should I do?