If I see someone struggling to pick up a box, I'd say: "Do you need help with that?"
Or I have to run an errand very soon, I could say: "I need to buy this gift by 4 pm."
Or if someone's car has stopped working, I could say: "Do you need a lift?"
Do the Japanese use the word "need" in this way? Or is there a special word/particle/ending that provides the same usage/function?