what kind of sweater&purse can i wear with this dress ?

Depends on the shoes that you'll be wearing. If you're going with black shoes, I would go with a black shawl and a silver clutch just to add some pop. If you're wearing silver shoes, I would go with a silvery shawl and a black clutch to let your shoes stand out more.

maybe not wear sweater and with a white purse to wear this dress

Silver or shiny black wristlet clutch with either a wrap or nothing at all. The dress is cute, so don't take away from it with accessories.

sweater-silver
purse-clutch

maybe a silver wrap with a matching clutch