After procrastinating for over a year, on Monday I finally brought a domain name and then setup a custom domain on Outlook.com (originally I was going to do a paid Exchange subscription, but I thought I would try free first)

So far, all good but after stumbling around Microsoft support and Google I am struggling to see if three things are possible.

1) I had to use one my other Hotmail accounts to setup the custom domain. Now that everything has been setup, can I use my custom domain login to manage my custom domain or do I need to keep on using my Hotmail logon?

2) It seems that I have two Hotmail logons, the one I know the password to (and the one I mention above) and another one that I don't know the password too. The password reset takes me to a gmail account that I have never used and when trying to reset that password it takes me to one of my ISP email accounts.
I am currently working through the reset password process on these accounts so I can gain access to them. Assuming I can get this done, is it then possible to 'link' or view any emails in these Hotmail accounts in my custom domain account. 

3) After creating my primary custom domain email, I wanted to get smart and create an email address similar to subscriptions@[mycustomdomain.co.nz] to handle all my subscriptions. However rather than it being another account to log into, I wanted to see any emails that arrive at this address to be shown in the mailbox of my primary email address. I thought this should be easy to do but for the life of me can't figure it out.

Can anyone help with these questions
If none of these are possible using the free Outlook.com, are they possible using a paid subscription of Microsoft Hosted Exchange or Office365?

Thanks