Custom Form (Front End)

Hi guys,

I have two questions. First I wanna know how can I create a custom form for the Front End. I wanna create a site that people can login in, and register some information about something. An example: movies. So I would create a form that have movies information, and store that in the database. But I dont know how to create that custom form and make it part of the front end. The only thing that I found so far is how to create custom forms to contact or to let people create posts. Thats not what I want. I want to create custom forms, let people register some information, and be able to see this information on the Front End and the admin see it too on the admin area.
On the admin area the admin would be able to see all the information that all the users registered. How do I do that?
Other thing, to make as site that force people to login in and input this information. The first page has to be a login page. Empty, with just the form login and a resgister link. You dont see the site unless youre logged in. But not logged in as the admin. Its different. It’s another page. Just for the normal users. How can I separate that?

Sorry for my bad english,

Thanks