Your receiver is not futaba...
It is a venom.. and I can't even find any info on that particular receiver, not even on the venom website.
Please refer to the venom manual (if there is one) to see which slot is for BATT, also please make sure your venom receiver has BEC or it simply won't work with the Tamiya ESC.
IF your venom receiver has BEC, try again connecting your SERVO's plug to channel 1 and your ESC's DARK GREY plug to channel 2 on the receiver.
The RED 2-pin plug from the ESC goes to the BATT slot on the receiver.
You should really try with a futaba receiver for sure.