Black spots on HP laptop screen

hey guys,
i have an HP dv6-1161TX Pavilion Entertainment PC.
it has been almost 2 years since i bought it...so out of warranty.
about 4 months ago i noticed these black spots on my screen. first there was one and it grew pretty large and then 2 more popped up recently and are growing day by day.
can anybody tell me what the problem is? nd how can i solve it?
i am guessing ill hav to replace the screen...how much would it cost me.
also my battery is screwed...the laptop hangs up without a charger and the system gets heated up pretty quickly. is it bcos of the battery or have i lost the cooling system too.
if i had to replace my screen, the battery and the cooling system...what would it cost me and how much time will it take? will i have to give in my laptop to the huys at the store?
i am seriously lost!
plz help!