Where can I find free cdl training with a felony 5 years old?

Most likely you are not. First CDL training is not free, it is possible that some truck firms may pay you back for it, like they do anyone else.

I was convicted of a Rape change in 1998,Could I get CDL through trucking schools and company.

You could get a license. Question is whether you can get hired and get insurance. There are companies that will hire/insure felons. You just have to find them.