P0700 is a generic transmission fault (basically says hey there is a transmission fault)
P0758 is a specific transmission fault (shift solenoid B fault)
P1768 is a specific transmission fault (Problem in A/T Clutch Pressure Control Solenoid Valve A Circuit)
P1773 is a specific transmission fault (Problem in A/T Clutch Pressure Control Solenoid Valve B Circuit)
P0420 is a specific fault code for a bad catalytic converter
The transmission faults could all be connected to unplugged or damaged shift solenoid pack on the transmission it's hard to say they need to be looked at.
The P0420 is a code that usually requires replacement of the catalytic converter. This can be expensive.
You could be looking at about $1000-1200 to repair these problems assuming the transmission is good and just needs solenoids or a pressure switch. If it needs to be replaced it's a couple thousand more. Hope that helps.