1st time grower needs help/answers

Hey this is my first post and my first grow so please be gentle.

Basicly i planted a few seeds in a pot as a joke and low and behold, they grew. I just have a few questions which if they could be answered, would be a great help. Pictures of my babies can be found hereâ?¦

Mobile Photobucket

Wat i would like to know is â?¦
1. Are the plants male or female.
2. Is it worth continuing with this grow
3. Am i likely to get anything out of them
4. How can i get them to flower and how long will that take

As i said any help would be gratefully appreciated. If the pics arent good enuff and theres a certain place on the plants or better angles needed then let me kno and i will gladley take more pics if needed.
Also any information you require then just ask and i will answer to the best of my ability.
Thankyou in advance.
Just so you know the plants are thai weed. The seeds were obtained from a bag baught for smokin. They are kept in a boiler cupboard, i give them approx 0.5L of water every 2 days and they are approx 80 cm in height from soil to top.

Once again thankyou to anyone that can help.

Growing from start to harvest takes dedication and education. So no, it isn't worth continuing unless you are willing to invest some into it. So:

1: Cant tell yet
2: See above
3: Judging from the last picture and the curled leaf in the background, no
4: Generally around 12 weeks from start to finish, 8 of those weeks spent in flower. Flowering is induced by changing the light cycle (photoperiod).

Couldn't get the pics to scale much larger than thumbnail-size, so a lot of detail that could be used to answer your questions is missing.

From what I could see of the last pic, it's looking like you may want to up your watering schedule and give it some more light.