We'll work with what you have
This is a family activity, we know ski gear is expensive especially when it's multiplied by 4 or more! First season, ski what you have, see if your racer is really into this before buying new equipment. Then talk to other parents on the team, kids outgrow gear in a couple of seasons, there is someone with used gear looking to trade or sell!
Here is a PDF outlining gear needed for racing at the different age levels: