engine light came,went to the garage ,was told it may be the emission controls

I have drove it for over 90 miles already

My car has 250k miles on it.

It's a manual transmission.

It also seems to burn some oil as well.

Tried brand new battery an checked fuses under hood. Car starts the dies and loses all power.

And I hooked up computer it's not reading the codes.

My diagnostic test keeps saying thermostat which I've had replaced 3 different times. This has been going on since I got my car in July

The car caught fire a while back because the wires. The insurance did bot fix the computer so I over heats cut off and now don't run at all.