Battery less than 1 year is completely dead. Zero alarm clicker doesn't even on 2000 Toyota Camry

unlock door. Started last week. Hasn't been driven since mid May.

Asked by for the 2000 Toyota Camry
Take it to a automotive store to do a battery check. They should be able to do it for free. They'll try to charge it up and let you know if it's just drained or dead. Most batteries should have at least one year of warranty, so you should be covered if you got it new and it is indeed dead.