Shopping list for baby: are cot bumpers necessary?

Hi all, would like to seek some advice, please, as it’s my first baby and I am quite clueless. 1. Does anyone have a new baby shopping list to share? I drew one up, on my own, but I’m afraid of missing out buying stuff which the baby needs. 2. Are cot bumpers necessary? The one that is tied to the sides of the cot. If so, how many sets do I get? Not sure if I should get an extra set to change when baby’s spit up etc get on the existing set and I need to change it for washing. Thank you! #firsttimemom #pleasehelp #firstbaby