My car splutters a little when i turn the key but it has a brand new battery now whats up with that?

i have a dream machine 1999 toyota corolla and its white has a couple dents from other asshole drivers denting it up when im inside a supermarket or something. the cd player has no usb slot so i have to burn CD's when i want to listen to music which get scratched up like 3 days after i burn them because of inconsiderate friends in my car or my other option is to listen to the garbage flowing through the radio.
pimp my ride please!

but if anyone knows why my engine splutters like is has a dead battery when i start it up please tell me because the battery is brand new got it a couple weeks ago.