Cannot​ use​ app​ store.

I apply apple id​ new use​r
and logg in app store 
and it came up to contact 
itune support
.which i bought an ipad mini1
 come from the shop.it second hand 
I​ cannot​ download app.
My​ number​ ipad​= DLXKCRGVF19J
NAME​ store: 2015111600