Around $50. I highly recommend the Kirkland brand that Costco sells. If you don't have a membership, maybe you can find a friend that does to buy it for you. They have better specifications than the battery that came with your car (higher cold crank amps, and higher rated lifespan) and also has a 3 year warranty. If you search, you will find lots of people recommend them. Also - changing out your battery is a very simple job so if you've never done it before, don't hesitate to do it yourself. Walmart and many other places also sell decent batteries.
Pretty sure its the same as the 2000 Toyota echo, see related link.
$1500 to $2000
It's in the red cover that is connected to the positive terminal of the battery
yes
hi i have smal question,how to change thermostat in Toyota echo 2000 thanks
There is an access panel in the trunk. Its very easy to change the bulb.
take it to the Toyota dealership and ask them to replace it
Don't fix them, replace them. Its an easy job, see related link.
http://pdftown.com/2000-2002-Toyota-Echo-Service-Manual.html
Yes.
search for echo manual torrent
If the A/C is not working on a 2000 Toyota Echo, the pump may need to be recharged. It is also possible that the belt for this is broken or the thermostat is sticking.