The thing with babies is that everyone gets on well with different thing so it's tricky to recommend stuff...however, for ideas on environmentally friendly parenting you could read 'Green Parenting' or 'Juno' magazine, they have loads of add in their classifieds for cotton/bamboo unbleached unisex baby clothes.
A lot of my crunchy friends don't even get a travel system they just use a sling (or have a few slings for different uses), have a google at (Ergo, Tula baby carrier, Manduca, Connecta, Didymos, Melkaj to name some of my favorites...), you can also buy a nice rain cover so you can be out in all weathers, the list is endless.
One of your best bets would be to go and look in one of those massive mothercares, until you have a go with a pushchair you can never really tell how you will get on with it...it's at that point that you see why people pay more to have a bugaboo or (my personal favorite) a nipper 360'.
I wouldn't worry about high chairs until you need one, same with dummies, not all babies need them (and to be honest a few years down the line they are a pain because you have to wean your dc off them, they always get lots and dropped on the floor!).