In my situation how much interest/taxes can I deduct for my rental property?

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Hi guys, newbie here.

I purchased a rental property in April; because it took a few months to complete all repairs it wasn't available for renting until September.

Here are my questions:

1. Can I deduct mortgage interest, property taxes and HOA just for the last 4 months? (September-December) or for the all year (since April)?

2. Can I deduct appliances as capital expenses and depreciate them even if they were purchased before September? I bought them in August.