Call if you hate money. Otherwise fold. These leaks add up tremendously. Hands like K7 and crap have no possibilities, you're either gonna hit a 7 which probably won't be TP, or you're gonna hit the K in which case you might be outkickered, but you probably already knew that.

From the blinds, this is where you can complete/call raises with suited connectors (given proper pot odds)with lots of posibilities, or hands that you would otherwise normally play like QJ, KQ, AT, AJ, etc etc.

Read a book about limit hold'em. What i've said barely scratches the surface.
Cheers,
Bluffman85