SharePoint 2013 H\W & S\W Requirements

Below are the minimum H\W & S\W Requirements for SharePoint 2013 environment along with per-requisites.

Software Requirement
Component	Minimum Version Required
Operating system	64-bit Windows Server 2008 R2 with SP1 64-bit Windows Server 2012 Std or Data Edi
SQL Server	64-bit SQL Server 2008 R2 with SP1 64-bit SQL Server 2012 64-bit SQL Server 2014/SP2013 SP1CU May 14

Hardware Requirement
Processor	64-bit, four cores for small deployments           (fewer than 1,000 users) 64-bit, eight cores for medium deployments (between 1,000 to 10,000 users)
Ram	16 GB for small deployments                               (fewer than 1,000 users) 32 GB for medium deployments                         (between 1,000 to 10,000 users)
HD for Web server and application Server	80 Gb should remain free for system drive. Rest drive and space depends on requirement.
HD Sql Server	Separate Data (mdf file) and log (ldf file) file drive each with minimum 50 gb free in real time.

http://blog.blksthl.com/2012/11/19/hardware-requirements-for-all-sharepoint-2013-components-summarized/

https://docs.microsoft.com/en-us/sharepoint/install/hardware-and-software-requirements-0

Pre-requisites

    Web Server (IIS) role

    Application Server role

    Microsoft .NET Framework version 4.5

    SQL Server 2008 R2 SP1 Native Client

    Microsoft WCF Data Services 5.0

    Microsoft Information Protection and Control Client (MSIPC)

    Microsoft Sync Framework Runtime v1.0 SP1 (x64)

    Windows Management Framework 3.0 which includes Windows PowerShell 3.0

   Windows Identity Foundation (WIF) 1.0 and Microsoft Identity Extensions (previously named WIF 1.1)

    Windows Server AppFabric                                            

    Cumulative Update Package 1 for Microsoft AppFabric 1.1 for Windows Server (KB 2671763)

Install and Download

http://blogs.technet.com/b/meamcs/archive/2012/12/26/install-and-download-sharepoint-2013-prerequisites-offline-manually.aspx

Note: SP2013 With SP1 is only supported in WS2012 R2
https://support.microsoft.com/en-us/help/2891274/sharepoint-2013-sp1-support-in-windows-server-2012-r2

For SharePoint 2013 Updates
https://docs.microsoft.com/en-us/SharePoint/sharepoint-updates