the TIM (artic silver is a TIM) should be pre-applied at the bottom of the stock cooler, you may need to peel off some protective covering or something, but it should be there
if not and it's completely cooper down there and there is no pad or tube of TIM for you to use, get some AS5 and call intel to complain (maybe you got a grey box!!!! missing component is one sign of it and you may have been scammed or intel screwed up in the packaging, then demand a upgrade for all ur hassle rofl)
The heatsink has a pad that melts filling the uneven bumps on the heatsink surface just like thermal grease. You don't need to use any thermal grease. I've even remounted stock heatsinks just with the leftover goo.