Do I need a new air filter?

Do i need a new air filter? Images in the link since it kept crashing when i uploaded the pics to ifixit.

Also, my wheel broke off ( the bolt did). Does this happen a lot?

Also (again) the rear wheel seems to get stuck while backing up. How do i fix it for cheap? (havent tried with 2 real wheels yet as my bolt is still shipping.

https://photos.app.goo.gl/T9DuM9PTuDF7H6...

also i do have a new dust cover plastic part, found it on a scrap mower. This mower that has a missing wheel was free to take.

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Is it worth anything to sell, its in great condition other than the wheel. Cant find anything on this specific mower

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pls help me, if u can

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anyone know anything bout this??

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hello?????????

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