Motor oil has drained into combustion chamber - probably just run until oil burns off
Replace the engine...End of story.
clutch for (your model mower) on eBay or other site that sells mower parts
Take it to Sears.
Yes .
You can attempt to fix it by reading this http://www.lawnmowerman.tv/Troubleshooting.asp Here its basically a homemade manual about lawn mowers and how to fix them. They give you helpful tips and the types of oils,blades that your mower needs.
Fix it.
sheared flywheel key. youtube has vids... type in mower cord backfires & you'll see instructions on how to fix it.
It depends on what the exact problem is. The most common problem of this type can be solved by replacing the drive belts. If this doesn't fix the problem, it's best to take the mower to a professional.
Helicoil.
Home Depot does have a repair service that repairs lawn mowers. You drop off the mower, they fix it and you pick it up at your convenience.
When a lawn mower will not start by pulling the cord, it probably needs maintenance. Changing the spark plug often will fix the issue.
yes but is is cost effective? that's your call