FTM questions!

Ta
I'm 20 weeks along with a baby boy & my husband and I are going to start buying big things here & there for his nursery. 
My question is, what are some things that you recommend (besides a crib & changing table) we plan on just putting a changing pad on this dresser we have instead of spending money on a change table. What are some things you spent money or someone bought you that you didn't use? 
Would you recommend a pack & play when they are newborns or when they are older?
Sorry for all the questions!
I'm sure these question has been asked before but I can't find the post. 
TIA!