If I refinanced my house before renting last year, is the refinanced amount the original purchase price or no?

No. 

When a loan is refinanced, it would generally be for an amount that was different than the original purchase price.  They do not have to be closely related at all. 

The original purchase price would be shown on the closing papers from when the house was purchased.  If you do not have those papers, the property tax records for the house may show the original purchase price. 

Thanks! It was 8 years ago, but luckily I kept the paperwork!