e7 & E120W communication and more...

I just bought a boat with

e7

E120W

Raymarine AIS (can't figure out model, but have a AIS350/AIS650 manual)

RS130 antenna

P70 autopilot controller

various old depth, speed, and displays

Problems:

* AIS works fine on the E120W, but nothing on the e7

* the E120W seems to be using the internal antenna on the e7. When it's not, no GPS fix

* E120W has all the charts I need, but the e7 doesn't. Can the e7 display the E120W charts or do I have to buy charts for both units

Thanks