Each car seat has a different expire date depending on what day/month it was manufactured. If you buy this set new it's highly unlikely that it was manufactured over a year ago.

When you look at the individual car seat it shows the year as 2015. Just wanted to give a heads up. Our car seat from our first expired so we are looking into a new one. It's a great deal though!

Wow amazing deal. I bought the chicco car seat and stroller.
Spent well over $400.

Where are you finding the manufacture date? Just because it came out in 2015 (if that's what you're saying) doesn't mean it was manufactured then. They still manufacture them now.
If you did find a date, and it was 2015 then it still has 5 years before it expires. Chicco infant seats have a 6 year manufacture life.
But I'm not understanding where you see a date?

That is one from 2015 so if you plan on using it for multiple children you might want to choose a different one.

Car seat is from 4-30lbs and stroller is up to 50lbs

How much weight can carry??