97 Continental problem with codes P1744, P0743, P0174

i have a 97 continental with 180K miles, it runs good but didn't pass the emission because of the ff codes --

P0743 - Torque Converter Clutch Circuit Electrical
P0174 - System Too Lean (Bank 2)
P1744 - didn't specify ( what is this code?)

any help about these codes?

And do u know how much would it cost me to fix all these? But, i rather fix this myself if isn't too complicated if ever. thanks a lot. help is appreciated.