The best way to come to Taizé is by car.Then you can also see a bit of the beautiful area around it.Take the autoroute A 6 towards Mâcon and leave at the exit for Tournus. There are signs showing the way to Taizé.
But since many of the students there don't have one, there are bus companies to take them there. Many students from Eastern Europe spend up to three days in a bus to get there.
By train you can take the TGV to Mâcon TGV and then a bus to Taizé.
To find the best way for you to get there check their website.
Going around Taizé is pretty easy! You might feel a bit lost for the first couple of minutes - till you meat someone, that is. :) Btw., there's a welcome for everyone who comes, but if you're coming alone ('alone' as 'not in a group), you should contact them. (Meetings in Taizé > On-line Registration > ...). There's a map of the camp, but everything's at hand - I'm sure you'll make it just fine... :)
You can travel to Taizé by train & by bus. There are connections from Paris, Lyon, Geneva and Dijon to the nearest train stations to Taizé (I went to Mâcon), together with connecting buses. There are links with the SNCF (the French railways) you can check here: CDG to Taizé. If you're coming from Paris Charles de Gaulle Airport to Taizé, there is a step by step guide for people who have never been to Europe before and who do not speak French! (Very probably... :) ) There are some more ways to get to Taizé, 'coz a lot of busses keep coming & going from many countries, but you can contact Taizé community for info on that.