Journalist Didier Francois said the four were chained to each other and kept in basements without natural light; ministers deny ransom was paid.
Nicolas Hénin says release of him and three other French journalists was a 'real surprise' and that he is 'filled with joy' but exhausted.
The four, held captive for almost a year, were found by Turkish soldiers on the border with Syria blindfolded and with their hands bound.
Hamza Madhouj says he took daughter, aged two, to Syria to obey obligation for all Muslims not to live in a non-Muslim country and that she is safe.
The pair were brought back to France having gone to Turkey in early January with the intention of joining Islamist fighters in Syria.
The father of one of two 15 year-olds who ran away from their homes in Toulouse to join jihadists in Syria said he was 'brainwashed online'.
French president and King Abdullah discuss crisis in the Lebanon during an official visit that is also aimed at boosting Franco-Saudi trade ties.
The four, aged between 22 and 35, were arrested in the Paris suburb of Vitry-sur-Seine following an investigation that started in mid-2012.
The kidnapping of Nicolas Henin of Le Point magazine and TV journalist Pierre Torres on June 22 had not previously been made public.
Didier François, a radio reporter, and photographer Edouard Elias were kidnapped near the northern Syrian city of Aleppo in June.
Move follows allegation that Rifaat Assad's fortune, including several dozen Paris apartments and luxurious townhouse, is result of abuse of power.
'Stunned' French president François Hollande called off military attack after US president said he was to seek Congress approval.
Presidsent François Hollande speaks of a 'controlled framework' to arm rebels caught between Syrian government and Islamist rebels.
Interior minister Manuel Valls says the 'hundreds' of homegrown Islamist militants fighting in Syria could pose a problem when they return home.
France's Laurent Fabius says UN report leaves no doubt that Syrian government is responsible for chemical attack but Russians still blame rebels.