Very cold day and my batterie was died and I tried to start it I got it going and now the speedometer and all electronics are not working?

If you just installed your battery the ECM needs time to boot then relearn where the idle should be as well as how much fuel to add when starting cold. Try leaving the battery in it and if it goes dead you have a drain in the electrical system if not it should work.

Sounds like a speed sensor, I will look into that, but if the speedometer isn't working, its either cable, or electronic. Being a 2000, I'm guessing electronic. Chrysler have a lot of electronics on the transmission, as they are electronic themselves. I had an alternator go bad and my battery died, and the car wouldn't shift, it actually down shifted while driving. Have your battery and alternator checked first, then sensors. Like shift silinoid, speed sensor etc.

have the battery charged and tested. GM alternators tend to take the battery with them when they die. A weak battery will make all the electronic stuff act strange. Make sure all the cables and connections are solid.

Get the battery.

If the battery is good when it doesn't start. I would go for the ignition switch. Just the electrical end of it. There isn't a security issue when replacing it.

Have you tried checking the battery? Try to give it a jump with another car. Cold weather kills car batteries FAST. Does the car crank over at all? Or does it just make a clicking sound without actually turning the motor? If jumping it gets it started, replace the battery and you shouldn't have any problems. Batteries typically last between 2-5 years depending on their use, if you have a lot of sick car audio and electronics pulling juice, it will cause a "deep cycle" which car batteries were not designed for and that will kill them quick too. If replacing the battery works for a while, but then it dies soon thereafter, you might need to start looking for possible short circuits or current draws. Hope this helps!

you must have crossed the battery cables. check all fuses under hood

ALL Grounds Need to Be Checks on this Including BATTERY They MUST Be CLEAN this Sounds Like a Poor Ground Problem.

Check battery cables. Clean and replace bolts that hold them on.

either your alternator has gone or your fan belt is not there which helps the alternator to charge the battery get a volt meter on your alternator to see if it is kicking out what it should be