Mate just train at home, Gyms suck, would never train in one personally.
As you get stronger check eBay and the like for extra weights and stuff which can be had cheap, bought some squat stands a little while ago for $20 the pair, picked up an incline adjustable bench with dip stands for $60 last week.
Depending where you are just saw a solid adjustable incline bench, with lat pulldown for $120.
Just shop around.
Or make your own squat stands out of some scrap building materials
You don't need to pay for an expensive gym membership and hang around all the douche bags that are in there to build muscle. You have a bench, just follow the beginners program on this site and go from there.
Lift as much weight as you are able to lift 7-10 times, if you can lift it more than 10, it's too light add weight and go again, not complicated really, eat some food and you will be fine.
I see you are about 6' tall, and only weigh about 80kg, so your first aim should be to gain about 15-20kg, not sure why you would want to be 70kg at 6' tall, you would look like a starving African at that weight
It always makes me laugh when people start doing weights are concerned about getting too big, it is not going to happen, you don't wake up one day and are too big, it is a looooong slow process.
Try Here:
http://ausbb.com/power-lifting/9460-beginners-program.html
Or what about Arnold Schwazeneggers 'Golden 6':
Squat 4x10
Bench Press 3x10
Chins/Pulldowns 3x10
Behind-Neck Press 4x10
Barbell Curl 3x10
Sit Ups 4x20