Yes, the Bucs can and will make the playoffs! They can beat San Diego, Carolina and probably split one game with Falcons. Given how well they played New Orleans in their first meeting, they should be able to beat them the second time around.
No. The Bucs have to face far too many quality QBs in the second half of the season and their pass defense has been awful. Phillip Rivers, Matt Ryan, Peyton Manning and Drew Brees will all be able to post big games against the Tampa Bay secondary.