1. Insurance- for company and automobiles what is the best way to go when starting out (general liability/commercial) I am starting out so I do not have a clue what these would cost me? (I never had it when I scrapped with my mom's bf but I plan on being a legit service now)
Get a small insurance plan that gives you a buffer for when you screw up. You can get a small business insurance plan rate that will vary between 500-1500 bucks per year. Variables like number of employees, occupational hazard, indoor and outdoor activities, office setting.. they all make a difference. However for a guy in a truck, I don't imagine it to be too steep.

and what is a estimate cost for registering a truck with commercial plates?
You're under 25. Your insurance premium for driving already blows. Don't make it worse. Stick with the basics. The only people who look at your license plates are cops and those who want to tell the cops about you.

2. I want to have advertising for my company on the vehicle and my friends father has a building with a lot that I can park in, which is located by a very busy intersection I plan on keeping the truck parked as like a billboard.. Do you need commercial plates for having advertising on it? ... I will only be working in new jersey in the beginning.
You kinda need to use the truck to run your business right? I mean theoretically, most of the time on this intersection it will just be commuter traffic. Most of the time people have a preconceived route they travel in town to avoid traffic and to stick to routine. We're creatures of habit. You might get 3 weeks of decent advertising if you don't have to use the truck much. Kind of pointless. A yellow pages ad or backpages/craigslist.org would work better. Throw on some magnetic decals and hit the road.

3. Here is my website http://www.JunkRight.com I didnt add pricing yet I am working on that. I did the whole design I am a part time web designer so no cost for the site except the hosting and domain fees.
Your website is terrific. It's easy access, easily explained, and even more simple to navigate. I like the layout. I like the tangible feel of the pictures and how they don't look photoshopped. The flash on the main page is a little much. People hate animation when they're looking for pricing and trying to concentrate on spending money. I learned this in college, still sort of true. Everything else though is spot on. Right down to the color scheme and the link layout. You got skills.

4. My main source of advertising I have planned is the truck itself, I want it similar to like a Junk Luggers or 1800 got Junk but a little less fancy but not ugly. I like that approach but I also want help in other ways. like a flyer, business cards etc. any ideas?
If you can design a website as well as you do, the rest is cake and ice cream. I wouldn't use vistaprint or cafepress or any other third party pic uploading site to get stuff printed and made. Just get yourself some MS Word and design some flyers. You can get free flyer templates on Microsoft's site or do a quick google search. Print your own business cards as well, seriously, you'll be glad you did. I've seen some rather crappy quality cards people have overpaid for. I mean my card is a basic MS Word template with my logo, but it still gets looks and people actually ask me to design their business cards. Use the perforated paper you can buy in the store. You can get like 500 cards for 17 bucks at Staples and Office Depot. They are the kind made for Avery templates which you can download from Avery.com. I mean honestly man, if your work ethic is as good as your web design, you'll do just fine.