battery??
 

what else would happen if you hook up the battery wrong. it blew the fuse but would it fry some wires

generally no, unless it was a really powerful surge, the wires should stil be fine, replace the fuse, and anything else thats obviously fried and test the car out then tell us what happened

Check your main fuse. Pretty sure it blew if u did that.

It could blow the ECU, but wires would be protected by the Main fuse. If you hook it up wrong or short out the alternator (among a few other things) the Main fuse blows pretty much instantly.

it blew the fuse and i replaced them but still dosent work

if it blew the ecu how would i fix the problem. is there a fuse to that or do i just have to replace the ecu

you'd replace the ECU.