After resetting the check engine lite on 2002 Tundra reconnecting the battery the horns start blaring and the clutch cancel lite blinks.

I have a 2002 Tundra and I got an engine check light. I followed the battery disconnect to reset but when I went to reconnect the battery the horns started blaring and the clutch cancel switch light started blinking. So I disconnected the horns but the engine would not start and the clutch start cancel kept blinking as well as the outside lights.  What's the possible problem and or how do I resolve it