Sounds like some Saiyan inbreeding to me...
I reckon he's related to Goku, not a brother but maybe a half-brother seeing as they both have Bardock's features, Bardock seems like the guy who'd treat women like pieces of meat and not call (hell i'm still waiting for mine)
There's not much else I can say really...he had a purple scouter, he was a rogue saiyan who didn't serve Frieza, only himself. Quite strong for a lower class Saiyan, he fought well against Goku. He plundered and hunted and that's how he came across the Seed of Might that grows into the Tree Of Might (which feeds off a Planets natural energy to grow) which bears the Fruit Of Might (anyone see a pattern there?) which gives the eater a strength boost. It produces a lot of them so if Turles spent longer picking fruit he may of surpassed Frieza or Cell in time.