I don't live in £ódź, so can't offer precise indications, but for starters you can try google (type "meble" +"£ódź" in google.pl) or use my search results from the querry -
https://www.google.com/search?q=%22meble to see the shops that have their articles displayed online.
Some basic vocabulary for you:
meble kuchenne - kitchen furniture
kuchnia - kitchen (this word also means oven, so you may see some kitchen appliances)
sypialnia - bedroom
łóżko - bed
jadalnia - dining room
salon - living room
stół - table
stolik - smaller (usually also lower) table
półka - shelf
regał na książki - bookshelf
krzesło - chair
fotel - armchair
wymiary - dimensions
długość - length
szerokość / głębokość - width / depth
wysokość - heighth
oszklony - with glass
If you need info on materials (for example types of wood), ask.
a useful thing in small Polish appartments:
ława - (don't know the English word, it's a table-like furniture, but it has always lower legs, and sometimes it's called "ławostół" or "ława rozkładana" then it's expandable so you can lift the top and also make it broader, then it looks almost like a normal size/heighth table
some pictures:
simple type (fixed dimensions):
mebletlok.pl
ława rozkładana (expandable) and/or podnoszona (lifted)