only driver can role windows up and down passengers cant
window lock broke on 2000 Buick Century
It may be a broken wire to or from the lock out switch in the drivers door harness that provides power to the other switches. Have it checked at a shop, if one wire is breaking there will be others.
do you roughly now how much
Not really. Trying to remember or guess prices won't help, with the millions of things we could have to do there are just too many to know pricing for certain and that reduces anything I would say about it to a guess, and I'm a lousy guesser. If it is wires breaking "I" can deal with that in 1.5 to 2.5 hours, if it is the switch then it depends on whether is it a single switch or if is it a part of an assembly. The best routine is to quote a time for the diagnostic phase of checking this out to confirm the problem and then from there get any parts prices and estimate the actual repair.