wont start after installing new battery on 2006 Scion tC

will a dead battery in the key keep the car from starting all the gauges and lighrs come on but on start and windows wont work to make things worse i cant even get it into nutral

Asked by for the 2006 Scion tC
No, the key won't affect what you are experiencing.

Sounds like you have a vehicle battery that is not fully charged, or some connections that are suspect. Check for voltage of the battery (12.5 or above), check to see if it survives a load test.

Then, check all cables at all ends from your battery onwards to make sure everything is secure and clear of corrosion.