But 6 pages of it are tips for riding in france.
If that interests you.
You will drop your first bike, everybody says they won't but we all do.
XTRS 125 - I was looking at buying one a couple of months back, but got a secondhand Honda instead, the reason being that Honda build their bikes to a minimum standard, and they will not go below that. There is no garantee with the chinese bike, which is usually half the price of the Jap one it looks like.
MCN did a 3 week series comparing a Aprilia RS 125, a Honda CBR 125, and the XTRS 125 a few months back, and it wasn't positive. (Engine blew up at Cadwell Park, after 4 minutes.) Sadly, you will have tro get the paper version, they didn't put it online.
There are some good chinese ones, but they are mostly bad, as the build quality is suspect, I spoke to a ex-owner of a Magelli 125R who had the handlebar come off in his hand, for instance.
You will also lose loads come resale time, as few people trust them.
The secondhand Jap bike is a better option, and the best bet is one of the CG 125, CBF 125, or YBR 125.
Provided you keep the oil topped up, a CG 125 will out last your grand children, and if it does less than 100 mpg, the is probably something wrong with it, Usually its the oil needs changing, but most don't get that luxury.
Sports 125's look good, but don't go the part unless they are two stroke, which you don't want because they cost a fortune to run, and keep running. That said, nothings gone wrong with my RS 125 yet... (It will when my brother figures out what a RS 125 is though...)
For a CBR 125R 2004 model it costs 500 quid to replace all the front end plastic, in the event of a drop, all from Honda itself. (The previous owner lost it on diesel, then I did a week after getting the little thing back on the road.)
You will find that it is a huge drop on your insurance premium compared to a bike, unless you get aformentioned 2 stroke race replica RS 125, which cost 350 quid a year back in lincolnshire, and £1500 a year in Coventry.
The CBR 125 costs 770 a year in Coventry, for comparision. A little 125cc scooter costs £250 to insure back in lincolnshire, and the renewal went down to 180 quid.
These, are quite likely to be cheaper than a car insurance quote, unless your with someone that almost every other 17 year old wishes they were with.
There are huge amounts of tips and so on around this site, including a list of ways of how 128 people dropped their bikes, in the new rider section.
As to the experience, if you can ride a bicycle, you can do the CBT. In fact, I know people who can't ride bicycles but did their CBT, and didn't need extra training.
The CBT will take you from total newbie to someone who can ride a bike safely enough to convince a instructor that they can ride on the road.
They will, or at the very least should, take you through everything thats needed to be safe. If they aren't happy after a day, most will invite you back for another day free of charge.
You may find that stuff you learn't from the car you carry over to the bike, which can be good or bad, depending on what it is.
Ultimately, good luck with the car test, and if you fail, you've got something in common with a F1 world champion.