Stroller for infant and toddler?

gi

So my toddler is going to be 2 when baby is here idk if I should get a double stroller or just use his old single stroller for her it is my last baby so I don’t want to spend that much but then it’s my last baby to spoil 😂 what are you guys buying? I also want something lightweight his light stroller just stopped working so idk what to buy for both or do 2 yr olds still use strollers I don’t remember with my oldest