Hooked battery cables backward.
wont go in gear ,windows don`t work,startes and runs. on 1998 Toyota Avalon
so what is your question exactly, you say it wont go in gear, your windows won't work, and hat it starts and runs just won't go in gear. I also notice it says hooked battery cables up wrong? But what is your question
Check for blown fuses , or ask a more specific question ??