H2 problems??

[Dmax]

I have an 03 H2 and am having a problem with I think electrical or something else that I hope you have some insight with. I try using the remote to unlock it and notice the lights are dim and when I get in turn the key I get nothing. Very dim lights on the dash and the key can't be turned to pull out. I have replaced the battery twice and have had other things happen but the same outcome no power. I have had where I was sitting just putting the [assenger window down and when it got all the way down sounded like clicking like it was still trying on the track to go down. and when I put it up the same noise if I help the switch. When I got out and pushed the lock button dim lights and won't start (not enough juice)
The last couple times when I turn the key and it won't start the radio cd player seems to keep spinning like searching for a cd to play even with it off. I don't have enough power to get the key out of the iginition.
The seats in the front won't work sometimes power or heat. they work in the rear. I don't know if something is shorting out or what is draining the battery. It happens when I am home and when I go to leave after it sits a couple days. The remote is programmed to the seats. Please any help is appreciated.