I think you can only get a skate board for the Bugaboo not a toddler seat so you will need one of those.

I think
- a capsule (if you don't already have one) and carseat
- a bed for the older child so bubs can have the cot
- clothes (if different season or gender)
- new bottles, dummies, nappies etc for the baby

I have also bought a sling which I didn't have with DD as I think it will make doing things easier. I actually haven't bought anything else yet - eek!