If you're purchasing the property, we thoroughly recommend having at least a standard EICR performed at the property, to highlight any present, and potential future issues. You could then opt to have a more thorough one conducted once the property is in your name.
The only real way of telling whether your electrics are completely safe is by having a thorough health check on the electrics (EICR) carried out by an experienced electrician. We specialise in these - please find out more here.