You can get L$ by..
Buying them
OR
Making buildings, textures, skins, eyes, furniture, clothing, etc etc & selling it
Also there are games you can play such as Linden Realms and Gold Hunt where you can earn L$ as you play, and there are other ways to get money too such as finding some sort of job.
Anyway, since you have no money.. Would you like to see what I could do to just modify a freebie fur into your fursona? Just thought I'd offer as it'd cost you nothing & give me something to do in my spare time fora little while.