from the city centre,you can hire bycycles for about £4.take the toe path along the canal du midi and then join the river garrone.it takes you out of the city into wonderfull country side.it would be espesislly good for young children as the back roads are quiet and it is impossable to get lost as you cycle between the canal du midi and the river.as long as you do not cross any of them ,you are either going to;or away from toulouse.the villages all have somewere to buy food,so no need to take a pack.