1999 Chrysler Town and Country Error codes and Trans issues

I had the radiator replaced and then the next day, I hd transmission issues. It revs before engaging first and second gear. I pulled over and noticed trans fluid sprayed inside my hood and the trans dipstick was dry. One of the hoses to the radiator was loose and I tightened it. I limped it home and then the engine light came on. I took it to Advanced Auto and it came up with codes: P700, P731, P732, P736 & P1782. I looked them up and all are transmission related I think. Do I need to replace the transmission, or is the 2-4 Circuit fixable? I dont know how much I want to put into it. And could the radiator repair have affected the transmission? I am a single mom of four and cant afford this. :(