How to handle an occupied property, bought from repository list

[Amber Arnold]

My husband and I are considering purchasing a property from the repository list in our county.  We live in Fayette county PA.  It is a double wide mobile home on a plot of land and appears to be empty,  but in okay shape.  My question is,  what if it isn't empty.  This is going to be our personal residence, of they have a lease with the old owner do we continue that?  Or Because it will be our primary residence does that mean we can evict them?  I'm finding conflicting information online. 

Also if it is empty,  how does one take possession after the deed is given?  Obviously there will be no keys.  

Thank you all in advance we've never done something like this before!