You can access almost all of the library's databases from home so long as you are an IUPUI student, staff, or faculty member. Simply access a resource link via a library resource or subject guide page and input your campus username and password to the IU popup window when prompted. Library resources are "IP-filtered". You shouldn't be required to log in to a resource or pay for an article.
Using a library site link is required for Books24x7 ebooks whether on- or off-campus. An alternative that works for most other resources, is to use a campus VPN link as described below. VPN can save time, allowing options such as bookmarking a resource site.