Did you get the car going? If not, start by checking the fuses and relays.
First spot,, under the hood drivers side, plastic box remove top panel inside you'll find, dash lights fuse, fan fuse or relay and more. Almost sounds like the main power wire to this box was took off and not put back on. Did you replace the engine?
Second spot,, under the hood passenger side, more fuses and relays, I don't know what these are for, as I can't reed mine the print is gone.
The third spot,, open passengers door on the side of the dash is a fuse panel.