[Uruk17]

First hand - I would probably shove you have top two pair only thing that can beat u is trips, which would likely have reraised flop cause of dimond draw.
Probably holding like ak or ace small.

Second hand - This is a bit tougher, the limp/call makes it seem like he might have a small pocket pair. That or he was trapping, as most hands won't call a 50cents reraise. With no read, its a real toss up here, but i find at these limits its usually worth the call.