I have a toro lawnmower and I can't keep it running. Ive emptied the gas tank and the oil , refilled both. I also changed the spark plug and even gapped it to;) the filter has also been changed and after all this it still doesn't stay running. Is there any hope for this lawnmower or what? Please help. Thank you

How old is the gasoline? Obtain new gas (preferably premium). Empty the mower gas tank & refill with the new gas. Gasoline has a shelf life of about 4 months. Fuel purchased last year will be no good.