What can I do if my landlord doesn't provide safe living conditions?

Two different things to try:

1) You can the landlord; he or she is violating your lease--you are paying to money to have a habitable space.  (In addition, they are violating what is called the "implied warranty of habitability," which is a term implied in residential leases.) You can therefore bring a legal action to both force the landlord to make repairs and for monetary damages--e.g. for the difference between the value of a home without a toilet, stove, etc. and what you are paying in rent, plus any costs you've incurred (like having to do more takeout) because of the problems.

2) It sounds like there are some actual code violations; you may report the landlord to the local dept. of health and/or dept. of buildings, as appropriate, to allow the government to pressure him, too.