Password reset and registration portal

Hi,

We have a requirement for implementing FIM 2010 R2 password register and reset feature for all users.

we don't need FIM service and reporting feature.

as tech net is bit confusing ,need information for below:

Hardware requirement:

number of service account required.

No of Mailbox required for service account.

SQL DB requirement.

Number of inbound and outbound rules required and for what purpose.

Thanks

Rag