If you just look on the Folger Tech site at the description of the printer you bought, you will find a link further down the page that takes you to all of the information you need including assembly instructions, the Arduino files, the Marlin files and the set up instructions. It's all there. It tells you step by step how to install all the software and firmware.

For the assembly part, there are a few mistakes in the wiring. To get the X axis to home properly, these changes need to be made to the manual. >>>

"Unlike all the other repraps, FT put the X homing switch on the right side, which is XMAX and not XMIN. The first thing that must be changed is to plug the X end stop into the Ramps board NEXT to the Y end stop plug and NOT skip a space. The pins to the right of the Y end stop pins is for XMAX. The one you show in your manual is for XMIN. That is at STEP 23, picture 10. “Again you are going to skip a row” is incorrect. It needs to go to the immediate right of the Y end stop plug.

Then in configuration.h in Arduino make sure that
#define INVERT_X_DIR true is CHANGED to #define INVERT_X_DIR false
AND
#define X_HOME_DIR -1 is CHANGED to #define X_HOME_DIR 1

Keep the plug for the X axis servo motor wires reversed as shown in the picture. Without an explanation, many people think that you made a mistake in the picture. Make note of the fact that the orientation of the colored wires is correct.

Finally, in Repetier, tell the user to go to printer settings/printer shape and change ‘home X’ from MIN to MAX.''