I already learned that Chinese wh- questions don't require a 吗 particle but I got stuck on this sentence: 你要买点儿什么？
Which does the sentence mean, "what will you buy?" or "will you buy something/anything?"
The 点儿 confuses me a bit. That's why I'm not sure if the question 你要买点儿什么？ is asking whether or not to buy or what to buy.
Also if I add a 吗 to the end of the sentence, thus 你要买点儿什么吗？, what will it mean?
Thanks for your help in advance!