Welcome to the forum, cam!
As to the IP change, you just need to change it the first time. Double check to make sure it has changed, though. You might want to consider a separate Windows (or Mac) User Account, that you use specifically for eBay/PP. That way, you can keep your everyday surfing separate from your eBay business.
Something else you might want to consider, in regards to your photos, is to use a free photo hosting site like imageshack or photobucket. That way, using HTML, you can have as many free pictures in your listings as you want.
You can respond either way, through g-mail or eBay's messaging.
You might also want to consider setting up a second account and get it up to speed, just in case eBay does happen to shut you down. This way, there will be less downtime for you.
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