We replaced the battery in a 2009 Toyota Camry and now the vehicle will not start! Help?

what brake light switch--where do i look for it?

same thing is happening to my car right now. i thought the battery had just died, then it looked like the alternator bc it was dying soon after it was jumped. now we've tried new, powered-up battery, but that doesn't help. won't turn over. dash is lit up. tail lights/brake lights wont work. gear shifter is stuck. (this morning the exclamation symbol was lit on dash, then on the drive home, ABS and battery light was going on/off. Seemed to turn on when at stop signs, would go away when driving again. Also, turning off a/c made battery light go off. then after car died and it got jumped, all the error lights on the dash were going on/off and the guages were flying up and down. Got it re-jumped to get to shop just across the street, but hasn't been able to get jumped since) Any help would be great, thank you!