Where is oil drain plug on toro 22'' mower- tecumseh engine

Look at the bottom of the engine or under the deck for a bolt to remove that will drain the oil..

Hi michael, You have most certainly put in too much oil. Try draining a bit off and then clean the spark plug with some paper towel. Leave the mower level for a few hours and then try it again.

replace your spark plug. it takes a Champion J19LM. If you left fuel in your tank over the winter then drain your tank and your float bowl. Add clean fresh fuel and it should go if not you need to clean your carb

there is one on the bottom of the engine i just run mine out of gas the turn it on it's side and drain it from the dip stick tube

Depending on what engine is on your Toro lawnmower, there may not be a oil plug under the mower deck. A briggs and stratton engine will have one, but if the unit has self propel then you will have to move the guard over the self propel cable. This is a 1/2 in bolt, you will also have to loosen the other bolt to swing the guard around.
On a Kawasaki or Honda, and even if you have a Tecumseh engine then just start the mower up for a few minutes and let the engine oil get warm, then shut the engine off and then lay the mower on the side that has the oil filler cap and put your drain pan under the oil filler cap. You can then drain the oil out of the oil filler tube. You can also do this with the briggs and stratton engine. I find this to be a very convenient way to change the oil.
Then put fresh oil back in the unit. I always suggest to put the engine manufacturer's oil back in the unit, or if that is not available then use another oil from another engine manufacturer. IF you use automotive oil, the oil will break down faster since the heat level for the engine on car is less than that of the engine on your lawnmower. The engine has a water cooled design, that keeps the engine temperature from raising over about 250 degrees F. The engine temp on your lawnmower can get as hot as 400 degrees F in the summer heat and being run for 30 minutes or longer.
A longer answer than you had hoped but I hope the information keeps your lawnmower running well for many summers to come. :)

PartsTreeRepairClinic may have a video

unplug the spark plug and tip the mower towards the side with the oil filler tube. Place a bowl on the ground to catch the oil. Thats it!

There is a crankcase vent on top that may be cracked or out of place causing the oil to leak or the upper crankshaft seal may be leaking.

The drain plug is located under the mower where the blade shaft comes out it may be covered in caked grass clippings scrape them of with a screwdriver or putty knife to reveal the square oil plug.

Your carburetor needs cleaned,you had gas in it that you drained out and replaced with new ? What engine do you have tecumseh,briggs,? Anyway remove carburetor and take apart get acan of carburetor cleaner and spray though jets in carburetor and blow out jets be carefull not to blow out needle seat !