Why are radio clock and dome light not working on 98 toyota t100?

Usually under the Steering wheel there are fuses for the Radio and Dome Light. Check and make sure they aren't blown. The Dome light fuse controls Time/Clock, and sometimes stuff like Door Lock controls, Keyless Entry Systems, Dash Cluster Lights, and maybe even headlight controls.

For the Radio there will be Radio No.1 and No.2 fuses check both of these.