Hey dude. There are a few options for you. Bear in mind, you need a battery, an atomizer (tank) and some juice. So...
Battery-wise, you could get something like this:
http://www.ukecigstore.com/accessor...50mah-variable-voltage-battery-by-vision.html
This is known as an "eGo" battery, and is what you have probably seen the majority of people vaping using. This is largely because it is what many companies will bundle in their "starter" kits. This is simply because they're small and cheap, but they're not actually very efficient. They are prone to dying after a few months of usage, and it's always worth carrying a couple around with you, cos charging them can be a pain and you don't want to be caught short when out and about. The version linked above allows for "variable voltage", which is basically a way of controlling the amount of electricity in your vaporizer, thus the temperature and quality of your vape. More control is good. Standard, non-VV models are available and much cheaper, but I'm not going to recommend them. They tend to be cheap Chinese shit.
Having said that, if you really are just "trialling" vaping, perhaps a cheap eGo battery is a decent option initially. I find it hard to recommend them, cos you will DEFINITELY need to upgrade if you choose to stick with it, so you will actually reduce your costs by starting with something more reliable initally.
A more reliable option would be something like this:
http://www.ukecigstore.com/eleaf-istick-mod.html
This is an entry level box mod. Box mods are much more powerful than eGo batteries, and will certainly last much longer. This one provides for "variable wattage", which is essentially a more versatile form of "variable voltage", and allows for even more refined control over the temperature of your atomizer. I myself use a VW box mod (albeit one that costs about 4 times the price, for various reasons), and can absolutely vouch for the quality of the iStick. It's a quality piece of kit that will last you for aaaaaages. It's also deceptively small, and will easily fit in the palm of your hand. Great value for money.
Now, atomizers. This is a fucking minefield, as quality varies massively between brands and, along with juice quality, will inevitably determine how satisfying you find vaping. Leaking, gurgling and general reliability have been massive issues for me (and millions of others) as I got to grips with the market and finally found a setup I was happy with. Fortunately that means I can impart my knowledge so that you don't have to worry about it.
If you choose to go with the eGo batteries, I can only recommend this tank:
http://www.ukecigstore.com/kanger-aerotank-mini.html
You can buy cheap, disposable, plastic tanks (clearomisers) that you will see other people use but, again, I can't recommend them. They are unreliable and, just like the cheaper batteries, you will end up spending more money over time replacing them than if you invest in a decent initial setup. The Aerotank Mini is by far the best steel tank that will fit on any eGo battery. It will last you forever, and if you get performance issues, you only ever need to replace the compatible "atomizer heads" which are super cheap.
If you opt for the iStick option, then get one of these:
http://www.ukecigstore.com/clearomizers/aspire-nautilus-mini-glassomizer.html
There are lots of options when it comes to tanks that are a little too large for eGo batteries, but the Nautilus Mini is, by far, the most reliable and best performing out-of-the-box. It looks good too, although you might want to replace the drip tip (mouthpiece) if you think it's a bit too big (I did). And again, maintaining it is as simple as swapping out atomizer heads. It's a brilliant piece of kit that I would recommend to any vaper (vapist?).
Now, the most important bit: juice. Annoyingly, it's very hard to recommend a specific juice, cos taste is so subjective. You might absolutely hate a flavour that I love, and vice versa. That's just the way it is. What I can tell you is that you will never replicate cigarette smoke with vapour. They're totally different beasts, and even the "tobacco" flavours taste more like a packet of baccy smells than actual smoke.
But there is always a compromise.
The "secret" is to initially buy loads. Shop around and buy all sorts of flavours you fancy. Ultimately, the trick is to find something you really, really enjoy. Starter packs tend to come packed with "tobacco" or "cigarette" flavours, and they taste like shit, so the user just fucks it off. You need to find a flavour that absolutely satisfies you, and that you enjoy, as much as a cigarette. Otherwise you're just gonna go and have a cigarette.
The UKEcigStore, that I've been linking, has a really nice range of juice. They have a cheaper range of flavours that they produce themselves, which are fine, but they also import alot of quality stuff from the US. Have a browse and pick up whatever you fancy. I'm sure you'll find something you like. If you do, you have no reason to pick up the fags again. If you don't, keep shopping. If I can stop smoking, anyone can!
Also, at the checkout, use the discount code "UKV" for (I think) 15% off.
Some of the stuff might be out of stock. If so, use
http://www.vapeescape.co.uk. Great website. UKV will work there too.
Any questions, feel free to ask. And let me know how you get on.