Girls. Has anyone used a stroller-car seat in autumn-winter time? I j…

Girls. Has anyone used a stroller-car seat in autumn-winter time? I just think it's quite mobile, and it will be convenient to take the older child to kindergarten too. But we're autumnal, the weather is currently average 9 degrees. I don't know if it will be comfortable for the baby in a warm jumpsuit and in this stroller? Suggest something) or is it better not to bother with this stroller on such weather? And how do you go to kindergarten with older children with small ones in your arms? You have to put the doll somewhere, how to dress the older one. In general, a mess in my head? The older one can dress himself, but help