Need to replace dashboard lamp on my 1997 Toyota

You need to pull the instrument cluster out of the dash. This is not a very hard job, but, you can damage the outer dash fascia as it comes off, past the steering wheel.

Move the steering wheel to its lowest position.
Remove the phillips screws that surround the instrument cluster fascia (under the top edge)
Pull the fascia off.
Remove the 4 screws that holds the instrument cluster to the dashboard
Remove the wiring connectors from the back of the cluster assembly, and pull it out. Replace the bulb, and reassemble. The wiring connectors cannot be mixed up, they are all unique.