Any low-power NPN transistor (e.g. 2N3904), any low-power silicon diode (e.g. 1N4148) and any LED will be fine.
For a 9V supply, calculate the value (in k-ohms) of the resistor (R2, R4, R6) in series with the LED as (9-Vf)/I, where Vf is the forward voltage of the LED and I is the LED current in mA that you want (see the datasheet for the particular LEDs you use. I suggest you use a LED current less than the maximum specified, to prolong LED and battery life). Example: Vf=1.8, I = 10mA, then R = (9-1.8)/10 = 7.2/10 = .72k = 720 ohms (use the nearest standard value, either 680 or 750). The other resistor values shown are OK for 9V operation.
The chips shown in my circuit are simulated ones from the LTSpice program. The 'PRE' input corresponds to the 4013 'Set' pin, the 'CLR' input is the 4013 'Reset' pin, the 'D' input is the 4013 'Data' pin and 'CLK' is the 4013 'Clock' pin.
Make sure your 4013 is a standard 4000-series CMOS type, not a high-speed CMOS (HC) type (which can't operate at 9V).