The model number of the engine would help.

If you don't know how to remove the air filter or change the oil, you should probably hire someone who knows a bit more to get it running.

Probably just needs the carb and fuel system cleaned and some fresh fuel.

I have an MTD and I emptied the gas tank then tipped the vac on it's side to drain the oil out the fill neck.
Mike

thanks to everyone for the tips. I found the manual and took off the air filter and replaced it with a new one and it is working fine.
bunny1433