The analyses of a long text #2

The narrator recalls his adolescence.
The narrator's old friend Mr. Micawber who was the clerk for Uriah Heep, the partner of Mr.Wickfield, who is the narrator's great aunt's old friend and a local lawyer, exposed Uriah Heep's illegal deeds, of which there is the misappropriation of great aunt's funds.
Now the narrator's old best friend, a lawyer Traddles and Mr. Micawber is dealing with the affairs.
The poor Micawbers is going to emigrate to Australasia with the narrator's old nurse's elder brother Mr. Peggotty.
Agnes is Mr. Wickfield's only daughter.
Chapter 54 Mr. MICAWBER'S TRANSACTIONS
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'Well, really,' said Traddles, cheerfully, 'I must, once more, give Mr. Micawber high praise. But for his having been so patient and persevering for so long a time, we never could have hoped to do anything worth speaking of. And I think we ought to consider that Mr. Micawber did right, for right's sake, when we reflect what terms he might have made with Uriah Heep himself, for his silence.'
'I think so too,' said I.
'Now, what would you give him?' inquired my aunt.
'Oh! Before you come to that,' said Traddles, a little disconcerted, 'I am afraid I thought it discreet to omit (not being able to carry everything before me) two points, in making this lawless adjustment - for it's perfectly lawless from beginning to end - of a difficult affair. Those I.O.U.'s, and so forth, which Mr. Micawber gave him for the advances he had -'
'Well! They must be paid,' said my aunt.
'Yes, but I don't know when they may be proceeded on, or where they are,' rejoined Traddles, opening his eyes; 'and I anticipate, that, between this time and his departure, Mr. Micawber will be constantly arrested, or taken in execution.'
'Then he must be constantly set free again, and taken out of execution,' said my aunt. 'What's the amount altogether?'
'Why, Mr. Micawber has entered the transactions - he calls them transactions - with great form, in a book,' rejoined Traddles, smiling; 'and he makes the amount a hundred and three pounds, five.'
'Now, what shall we give him, that sum included?' said my aunt. 'Agnes, my dear, you and I can talk about division of it afterwards. What should it be? Five hundred pounds?'
Upon this, Traddles and I both struck in at once. We both recommended a small sum in money, and the payment, without stipulation to Mr. Micawber, of the Uriah claims as they came in. We proposed that the family should have their passage and their outfit, and a hundred pounds; and that Mr. Micawber's arrangement for the repayment of the advances should be gravely entered into, as it might be wholesome for him to suppose himself under that responsibility. To this, I added the suggestion, that I should give some explanation of his character and history to Mr. Peggotty, who I knew could be relied on; and that to Mr. Peggotty should be quietly entrusted the discretion of advancing another hundred. I further proposed to interest Mr. Micawber in Mr. Peggotty, by confiding so much of Mr. Peggotty's story to him as I might feel justified in relating, or might think expedient; and to endeavour to bring each of them to bear upon the other, for the common advantage. We all entered warmly into these views; and I may mention at once, that the principals themselves did so, shortly afterwards, with perfect good will and harmony.
[David Copperfield by Charles Dickens]
1. I'd like to know why it is "making this lawless adjustment of a difficult affair," not "making nullity of a difficult affair."
2. I'd like to know what taken in execution" and "taken out of execution" mean.
3. And I'd like to know what "five" means.
Thank you in advance for your help.