Christian is correct, and you need to get lessons, but don't try to learn it all on your own. It will slow your progress, if you survive!
However, one thing I need to point out, is your terminology.
There are kites and there are kites!
Firstly, a 'traction' kite is another name for a Power kite. A power kite is NOT a kite surfing kite, well not in the hands of a beginner anyway.
Anything that can latch onto wind and pull you, be a kite, a box, a piece of plastic, an old umbrella, anything that wind can push will be enough to pull you, and depending on wind speed, conditions and 'kite' used, you could be pulled hard enough to hurt yourself. Of course with a real kite surfing kite, which is either a foil (or twin skin) or an inflatable (or called a Leading Edge Inflatable) kite, you will learn to kite surf, but only in terms of handling the kite. Water starting yourself with a kite and a board, requires co-ordination, muscle memory and lessons coupled of course with lots and lots of practice.
Personally, it took me 1 season to just get going for 100 metres, and another season to control my direction, some upwind ability and transitions (changing direction). Another season on top of that and I started doing basic jumps. So in all about 3 to 4 years!! Kite surfing requires commitment and determination. But of course some learn it more quickly than others. However, to boost my initial sessions without ever touching a kite surfing kite in my life, it was a good investment to do 4 to 6 lessons at least!
I digress. Power kites are kites that are used either with handles or a bar, and have very little to mostly NO depower. Most trainer kites (HQ Hydra, Gasstra, Ozone Octane, etc) are power kites that are good for static flying on land mostly. And as you've probably guessed, Power kites are great for buggies and land boarding. However, they provide little safety features, there is no power control (depower), and they are not made for jumps!
Leading Edge InflatablEs (LEI) are what most people use when kite surfing. They are relatively simple to control, have few tangles and bridles compared to trainer or foil twin skin kites and are mostly 4 lines, which means two lines in the middle leading into your harness and two outside lines for kite steering left or right. Unlike Power or Traction kites as you call it, LEI kites take most of the forces through your harness so as to not tire you on your arms. Whereas, a power kite is generally controlled and held by your arms alone, and the pulling power of such kites is quite strong and powerful.
So, you want to get a 'trainer' kite? Stay away from the Uno. Try the Ozone Imp 1.5mt or Ozone Octane, which comes with a control bar, a basic chicken loop so you can use the kite with a real harness. If you really want the full "kite surfing" experience, without buying a huge 10 or 12mt kite, then get a 4mt LEI kite with bar, lines, pump, bag and a harness (I recommend Mystic). You will have a mini kite surfing kit, that you could use one day in winds above 30 to 40knots even - when you"re experienced of course. But at least you will have the real deal. Like Cbula said, if you just buy a trainer kite with 2 lines, no depower, no harness, all you will ever learn is just static flying and figure eight flying which is very minimal.
BUT before any of the above, book your first lesson now, get real training from pros and you will be heading in the right direction.
Good winds and safe riding!!