1995 Toyota Camry Dom Light and radio ,themostat guage),che

Good Afternoon,

I have a question, the radio, dom light, and automatic antenna just stopped working and then came back on w/n about 10 mins. the themostat guage will fluctuate periodically and lastly, the check engine light will come on, and go out after about 10-15 minutes. any suggestions??

thank you so much, I'm about broke and need some help.