Help with foundation for really dry skin?

i have really dry skin, like loose flaky bits but that are still attached. when i use foundation, it makes my skin look drier, and you can easily see the flaky bits =[
i moisturise, drink plenty of water and exfoliate but this doesnt seem to help
i have used shiseido moisture mist beauty cake foundation applied with a damp sponge
also maybellines pure makeup with 50% water
but both dont help. they even out my skin tone, but when people are close, they see the dry skin flakes
would revlon colourstay foundation be good?
also, that foundation is best applied with a brush but when i use brushes on my face, they pick up the dry skin and kinda lift them up so it looks really bad
what can i use?

also, just wondering, how long would it take for you to buy that revlon foundation on 16 year old minimum wage? i think the prices in New Zealand are ridiculously high. it would take me 3 hours. if you answer this, please tell me what country you're in too.
thanks!