a few peg preg. switch questions

i hope someone knows what im talking about...

i got mine in the mail yesterday!! so excited.. but i forgot to find out how i get the straps or whatever it is so that the carseat snaps in? any one know what im talking about??

also does this stroller have the sack that goes around where the babies feet would come out and snaps on so that it looks like a sleeping bag on wheels??

sorry about my silly descriptions i just dont know what these things are called