Your printer looks like a Replicator 1 clone. This is a good thing.

1) Please go to the Flashforge forum and see the stickied thread for the sailfish manual. Pay particular attention to Chapter 5 regarding calibration!

2) Don't use RepG. Ideally use Makerware (download link also in the Makerware Forum) or purchase Simplify 3D.

3) Basic PLA guidelines: extruder temp +/- 200C, platform temp +/- 60C (glass point of PLA is 65C so don't exceed that)

4) Print some calibration cubes. Only once that's nailed is it worthwhile to move on.