Craftsman lt 2000 replace blades?

I was trying to get my mower running for the first time this year. I had to replace the battery first. While connecting the positive lead on the battery I accidently touched the negative lead with the wrench and caused a small fireworks show. I didn't think much about it until I tried to start...

Why am I having to twist my motor around by hand, off of a compression stroke, before it will start?

My lawn tractor blades do not engage when I lift the attachment clutch lever. I replaced the belt but that did not fix the problem. Anyone else had (and resloved) this problem?

Have a 42", 21 hp Craftsman Bob Villa mower and when you pull the PTO switch out it kills the engine. If you slowly pull it out the blades will engage as long as it stays in same position, you can't pull it all the way out or it will kill the engine. Have replaced the PTO switch, same results. ...

What can damage the turbines on the turbo for a 7.3 ford diesel. This is a 2000 that had to have the "rod"? Replaced which right after the bolts on the turbo came loose and caused the turbo to come loose causing vibration that caused the new "rod"? Loose and damage the rod and somehow two blades...