Yes, you should list all accounts but put a "*" next to the figure and write at the bottom of the page "* accounts held jointly with husband." This will let the court know that you are disclosing assets but they are in both of your names.
Yes. FL-150 is an important form to aid the judge in evaluating the financial resources available to each spouse. You should answer each line truthfully and fully. Best of luck.
I am licensed only in California. This information is good only in California and it is not to be taken as legal advise in any other type of situation.