Help please for newbie

If you go on line and search for caravan/car  outfit matching, select the make, model and year of the caravan and car and it should come up the answer. 

I would say it is far from a sensible match especially for someone who is not an experienced caravan tower. The car is neither heavy nor powerful enough in my opinion. I do not believe it to be a good match at all.

Towing a huge white box of a caravan is different from towing a low trailer. A caravan will be much more affected by side winds and turbulence from passing traffic and I seriously doubt that the Touran would be man enough to control a sway. Sorry.

My rule of thumb has always been big car + small caravan.

Towing my Eriba with a 2.2 litre diesel Land Rover might seem taking things to extremes, but it sure solves a lot of problems. 

I would agree, I would not want to be towing anything above around 1300kg MTPLM with your Touaran going on what some matching sites say.

What are the various weights of the car?

Kerb weight

Max gross vehicle weight

Max train weight

A 1.4 engine isn't going to be up to towing anything beyond one of those mini teardrop type vans IMHO. If you are set on anything other than the smallest of vans, get a heavy car and an engine with some grunt.

What’s the nose weight, that could be problematical as well

All good advice above. As a newbie, I would be inclined to stick to the club's recommended guidelines and not exceed 85%. I don't know the weight of your car, but I suspect it is not in the region go 1685Kg. We all usually start out thinking that we will only be using the combination on sunny dry days. Trust me, when the weather does it's worst you will be grateful of a heavy car with good stability, torque and power. I recommend a diesel if you are using an engine of 2 litres or less. My own preference is for automatic transmission since I find it easier and more relaxing. Some prefer manual transmission, whatever you feel comfortable with. If you like VW, there are a number of models in the range that would be suitable. Do check the nose weight limit of whatever you will end up buying as some cars have ridiculously low allowances which might mean that you are unable to sufficiently load the Tow ball and thus risk stability of the outfit.