Q:do they give a brush along with this eyeshadow palette ? i mean eyeshadow brush
A:No they don't give any kind of brush
Q:can it be used as a highlighter?
A:The whitish shade can work as an highlighter upto some extent but I personally would not recommend that to be used as highlighter if you wanna have a flawless look.
Q:it is waterproof
A:if only you put an primer below it. it'll start to crease after 5-6 hours.but it's worth a buy because of it's amazing colors n great pigmentation, also the versatility you can create plenty of looks