Because Google Didn't Work

[Ravenshire]

1. Do landlords usually allow you to install extra locks on doors?

I don't think there are any laws against it. Really it depends on the landlord. If he's the type to want access to your residence at any/all times then he won't allow it. If he's any type of reasonable, he will. I would simply chance out the lock and see how it goes. "I'm sorry. I didn't know I couldn't do that. I'll put the old one back on. Here's my notice." should work for smoothing over the rough spots.

2. How do I change an air filter?

Furnace? Fish tank? Gas mask? For any of these, if you have a model number you should be able to Google it. If not, your local Home Depot/Lowe's can identify the right filter for a furnace and usually describe how to replace it. Same for fish tanks and gas masks. You just need to identify the model number and visit the appropriate shop.

3. How do self cleaning ovens work?

I've never known one that did.

4. I don't know anything about hanging curtains!

This one I really can't be any help with. We have vertical or mini-blinds in all the windows.