Marius occupied in the Gorbeau house, for an annual sum of thirty francs, a den minus a fireplace, called a cabinet, which contained only the most indispensable articles of furniture. This furniture belonged to him. He gave three francs a month to the old principal tenant to come and sweep his hole, and to bring him a little hot water every morning, a fresh egg, and a penny roll. - Vol 3, book 5, chapter 2
After Marius met Courfeyrac, Marius lived with him. But one day, his proprietor came and he had to get his money. Marius ordered him to bring Courfeyrac. He said Courfeyrac what it had not before occurred to him to relate, that he was the same as alone in the world, and had no relatives.
Mlle. Gillenormand already found where Marius lived and sent 600 francs, but he returned it, and he only had 15 francs. So he sold his clothes and watch to pay all of his hotel bills and left his place. Courfeyrac also introduced Marius a translating work, so he studied English and German by himself alone, and started the part-time job as a translator.
He got a room in Gorbeau house(Yes, where Valjean and Cosette lived.) and he finally got the license of a lawyer. His life there was tough, he had only ragged clothes, poor food. At his age, other people usually have pride, but he only felt shame and he dropped his eyes more than once on his dilapidated boots.
Years past. Marius accustomed this lifestyle, and he could afford to help other people. Marius's landlady, Burgon told his neighbor, Jondrettes would be kicked out because they didn't have a fee. So Marius paid instead.
He sometimes went on a stroll to on Jardin du Luxembourg, but he only liked the cornered area. Because he was a handsome young man, many ladies looked at him, but as a poor, he only had old and shabby clothes, and he thought these ladies were laughing at his appearance.
But there was only a girl Marius did not care about. She was a 14-year-old girl with her old father on the corner of the garden. She didn't seem to be interested in him and only talked with her father. Her father was in grey/white hair, and looked like a retired officer from the army, just like Marius's father. He and some students watched them, and Courfeyrac named them Monsieur Leblanc and Mademoiselle Lanoire, from his hair colour and her clothes. But Marius stopped going Luxembourg for 6 months. And later, he went there again.