Help me out mamas...what else do I need?

I bought the below in size 6-12 mos size. LO will wear this size from late Sept/Oct into Spring.

3 leggings
2 sweat type pants
2 light weight sweat type pants

3 hoodie tees
1 zipper sweat hoodie

6 zippered sleep & plays

For the most part everything is mix & match. I'm thinking he needs onesies- short sleeve & long sleeve, he needs warm(er) socks or booties.

I like the GAP onesie sets- nice & neutral colors, but the Primary onesies are fun. How many onesies should I get? The store I am buying from also has short and long sleeve tops in that size.

Any bootie recommendations? Our stairs and main floor are hardwood.

More pants? The store I am buying from has cotton cargo pants marketed for crawlers. ETA: oops marketed for outdoor play.

More "outer" layers? A real coat or jacket?

Do you have more sleep n plays in each size? I might buy more when new patterns are released, but I don't want to go overboard.

Any input is helpful. TIA