You jack it up and remove the wheel lug nuts, pull the wheel off and fit new one, tighten up lug nuts.
32 psi
32 PSI
It is in the trunk. Look under the carpet and you will see a plastic cover with tools on it. The spare tire is under that.
http://www.carspace.com/guides/Toyota-Echo-How-to-change-oil
To change an actual tire you need a tire machine to get it off the rim and the new one on. -If you mean the change the WHEEL and tire on a car, then you just need a jack and a tire wrench.
Which bulb are you trying to change?
See related link. Its not an Echo, but close enough.
For my 2002 Echo it is 3.7 Liters with a filter change.
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A change in overall tire height will change speedometer accuracy.