An alternative seems to be offered directly from the device:
The Windows Phone 7.5 operating system makes it easy to transfer contacts. Tap the arrow to go to the second page menu. On here you’ll find a simple Contacts Transfer app, tap it and make sure Bluetooth is switched on in your Nokia Lumia
This should (hopefully) be valid for ...
Here I got solution about your question on WhatsApp FAQ page. It says
You cannot restore the chat history from any other phone type to Windows Phone, or from Windows Phone to another phone type.
This question is possible duplicate of this.
In short: no.
I'm afraid there is little support in the area of custom flashing for your device as it is, even on the Android side.
This topic on XDA guides you to root the device and install a custom recovery but doesn't give any links ROMs, which you'd need. There is, however, a topic that allows you to install Cyanogenmod 12.1 (Android 5.1.1) here. Note ...