That would depend entirely on the particular Toro mower you're referring to.
Kawasaki 15 HP Ariens Lawn Mower takes 1.2 Litres of oil and maybe a little more when you change the oil filter
Depends on the size of the mower.
Since you don't specify, I will assume you mean a power mower. A stripped-to-the-bones walk-behind power mower? $140 - $180. A bells-and-whistles self-propelled walk behind? $350 - $400. A lawn tractor? $1,000 and up.
6,250 J
The price of a push lawn mower typically ranges from $100 to $500, depending on factors such as brand, size, and features. Basic manual push mowers are generally on the lower end of the spectrum, while self-propelled models or those with advanced features can be more expensive. It's advisable to compare options and read reviews to find the best mower for your needs and budget.
That will vary for each make and model of mower.
It depends on what kind of lawn mower (push or ride). I sell my fixed push mowers usually for $30.
give up and hire a lawn service...
4 hp
10 dollar
about as much as a lawn mower
Check the oil/fuel mix and make sure you have it mixed to the correct ratio. Else, try raising the blade on the lawn mower. If you have the lawn mower blade too low, mowing tall grass, it can make too much work for the mower and will cause it to overheat.