the address of a squeeze page

Put aside for a moment the vague idea of "squeeze page".

If you have a domain, example.com (always use example.com for EXAMPLE!) - what is that you are/were planning to have there?
What is this domain for? How big this site is going to be? (1 page, 2 pages... 1001 pages?

The URL/address of your squeeze page will be exactly what YOU determine to be! Can be:
- example.com
- example.com/optin/
- example.com/optin.html or optin.php
- example.com/cazzo/

2. There is no "logical" order, per se. It depends on your own sales funnel.
Take a piece of paper and draw the path you want your visitors to go through -
Here is a possible variant:
squeeze page > thankyoupage (telling them to check their Inbox for confirmation) | > confirmation link in email > sales page
-- if buy > payment processor and back to > download (DL) page: 2 DL links: the free report for optin + the purchased product;
-- if NOT buy > free report DL page

Of course, this is just ONE possible way to build your funnel; it can also have OTO (One Time Offer = if clicked away they can NOT see it again!); upsells = offering a more expensive but complementing product; downsell (if they didn't get the expensive one)... and so one.
Even on the download page you can have related offers of your own products or affiliate products. The variations are almost endless - it all depends on your products, offers and your goals.

Any page where a visitor arrives = landing page. The airplane landed...
It depends what is on the rest of the site; what kind of traffic you have etc.

#4 just doesn't make sense, so let's not go there...

P.S. Don't get distracted by the 'fancy' terminology. It is all about marketing common sense. Put your offer (free or otherwise) in front of hungry eyes, take them through your funnel (don't offer side links > just straight where you want them to go) step by step. Make sure the freebie seekers are on a different list than the buyers!