Problem with my 99 Tacoma

The night before all this started i tried to change my reverse lights but they didnt work so i put the old one back in and put everything back like it was .... I woke up yesterday morning and cranked my truck and noticed my dash wasnt working like speed and rpms and all that and then i noticed my truck wasnt shifting right so i drove to school and didnt mess with it , i cranked my truck that afternoon and my lights kept dimming and my truck kinda shut on and off a few times so i pulled over and long story short we found out My altanater went bad and my battery was drained so got a new battery and altanater and put those In and my dash still doesnt work and my truck will not leave 2nd gear but all my headlights and all that works let me know if you possibly know the deal

 

Might of messed up a ground wire somewhere

 

Check for blown fuses?