my iphone is saying iphone disabled connect to itunes what do i do?

Why don't you try connecting it to your computer running iTunes...

i did but i'm at school and for somereason i cannot download itunes to enable my phone

Then you're stuck. You MUST restore the phone using iTunes. Either talk to your school's IT department, find someone who already has it on their computer, or take your computer someplace where you can connected to another network that's not restricted.