Green’s Dictionary of Slang

(Aus.) praise, esp. if ‘laid on with a trowel’.

1900–10		Stephens & O’Brien Materials for a Dict. of Aus. Sl. [unpub. ms.] 160: TOKO slang praise, flattery, blarney, synonymous with slang ‘kid, ‘kokum,’ ‘taffy.’.
1941		Baker Popular Dict. Aus. Sl.
1943		Piqua Dly Call (OH) 22 Apr. 4/8: To continue our Aussie Double-Talk list [...] Toko: flattery.