Need urgent help

Hi first time, have a new place as bkf and must from now on with a pushbodenauflieger to france. unfortunately have no experience. my boss does not have the gedlkarte yet and therefore has to give me cash. he means that to me 500 € for a week enough. however, I have my thoughts. if I have to fill up and then still the toll then I know au ned…. and my 2nd problem is, I have no idea like that in france with the tout running when I pay the bar. must ic h there anything special or something ? can anyone help me?? thank you already greeting andy