True Blood, isn't it? :) Just looking quickly, they all speak with a southern US accent - the show is set in Louisiana.
These are fairly common habits in a number of dialects. My Australian grandma habitually said "youse" (actually, "youse was..."!). Teachers would correct us at school by saying "Youse (ewes) are sheep."
The me/you at the end of the phrases are just for emphasis. Here's a rewrite in standard English.
"I've got plenty more bullets, I have!"
"You sound like a white man, you do."