Here are the "out-of-the-box" font settings in LM14 mate - taken from a live usb:
I'd just go to Appearance > Fonts and change each setting manually.
I don't know that there is a command to do it.
Desktop: C2D E6400 / Asus P5LD2SE / 2GB ram / Asus GeForce 210 / 320GB (WinXP) & 1TB (Mint - various)
Laptop: Asus A53E-SX1455V - i5 2450M / 4GB ram / Intel HD 3000 / 500GB (Win7/Mint 17.3 Cinnamon)