I do not know much about vehicles, but I bought my Lexus in 2008. It was in excellent condition with 30k miles. About a year ago, my "Trac off" light, VSC light, & check engine light came on. Due to certain life issues, I have not brought my vehicle in to get checked, but I did not notice any problems with the way it ran or what not over the past year. Over the past weekend, my car would not start unless I cranked it several times. I brought it to AutoZone to get the battery checked. The battery was no good, so I bought a new one. Now, my car will not lock/unlock unless I manually lock/unlock it. All my windows - excluding the front driver & sunroof - will not roll down. My air only blows hot air, and I cannot turn my air off. Several lights on my dash board & radio screen area are not coming on. I know I will need to bring it in to get checked out, but does anyone have any ideas on what may be going on? Thanks!