You can follow these steps to add Facebook Page to Blogspot.
#1. First, access this free tool (Free version is enough) and click Create widget for free
#2. Choose one of Profile Widget layouts and click Continue with this template .
#3. Next, After connecting to your Facebook Account, select a Facebook page.
You can also set layout, style here then click Add to website for free.
#4. Next, Click Publish on top right
#5. Choose Free Plan and click Copy Code .
#6. Edit Page (or Profile) where you want to add Facebook Page
#7. Place cursor at position where you want to add Facebook Page
#8 . Click icon in top left of Editor
Choose HTML view
#9. Paste your embed code
#10. Result