All the information about possible configurations and accessories included we do feature in the Specifications part - just click on the Accessories part, etc., all is written there. These are informations we collected from the manufacturer and the shops, we don't sell the stroller, so I cannot tell you the price, it always changes, from country to country, from shop to shop. You need to google and find an online shop or a shop in your country selling this, and they'll tell you.
It is also possible the model won't be sold around you, or sold no more, anywhere. These things change quickly, so you need to ask the sellers, the producer...
And, about the usage of the pram, there can be a 2in1 OR a 3in1 system, that is up to your choice. The bassinet is from birth, and the reversible seat unit will be the second part to use with a 6 months+ child (to up about 2 years of age, size-wise).
As the manufacturer orders these from Polish Tako, there are most accessories included, yes.