Q: Wont start been having tk tapw started solinoid now that wont work a month ago the power and ground were mixed up on my car.

Hi my 2005 scion Tc won't start. About 2 months ago someone used my battery to start my friends car and put in back in to jump start my own car with my friends after hers was running but he mixed up the power and ground cables he put the power cable on the ground post and the ground cable on the power post since then I have been having problems starting it. For a little while I was taping the starter selinoid and it would start now that wont even start it I have checked all the fuzes under the hood and under the dash replaced the ones that I was were blown or bad and put new ones in and it still won't start. I even replaced the starter fuze under the dash on the driver side. What can be done ke what needs to be done. It won't even start when I trued to jump it off

My car has 165000 miles.
My car has an automatic transmission.