Driving offence LC20 - Fined by court - Naturalisation

Hi,
I have been living in the UK since Sep 2001. I was granted ILR in Jan 2012. Now I want to apply for Naturalisation.

I have a traffic offense back in April 2008. I was driving car on International license. I have stopped by police offer. He asked me question about my driving license I told him that I have International License, he asked me when did I come to UK. I told him I came in Sep 2001. He told me that I can't drive on International license as I have been living in this country for over a year and I also have UK provisional license. He seized my car. After few months I received the Her Majesty's courts service collection order. I admit the offence and didn't go to court I paid £100 fine and I received 3 points. The conviction date was July 2008.

Since then when ever I apply for extension and when I applied for ILR couple of years ago I declared my traffic offence.

Now I want to apply for Naturalisation,

I want to know if my offence comes under criminal offence?
Do I need to tick Yes on question 3.6 where it say Have you been convicted of any criminal offence in the UK or any other country?

I rang DVLA ask them if I have any points on my license they said no. I told them that I go points on my license in July 2008. They told me to fill D1 Application so they will send me clean license.

I want to know if I apply for Naturalisation now the traffic offence which I did back in April 2008 will effect my case?
If Yes then when is the best time for me to apply for Naturalisation.
Kindly help me.

Declare the conviction as a conviction and you'll be fine.

Thank you Guru for your advice. I have few more questions.
Do I need to send my counterpart with the application?
I have passed life in the UK test in Nov 2011. Do I need to pass life in the UK test again?
If I send my documents after 28 Oct do I need to pass language test ( I am graduate from UK university) if not do I need to send my degree?

Question 3.5 Address of Tax office or tax office reference number. I don't know my Tax office address where I can find this.

I have requested employment letter from my employer. Can I send the letter with my application. I have been living in UK over 12 Years. My last employment started in 2006, do I need to tell other employment or studies I have within that period.

I hope you don't mind to answer these questions.
Many Thanks