your pics didn't work for me, i got the 403 forbidden error.

without seeing pics....sounds like you need a new front tire. seat, if it's comfortable, and you don't mind, can stay. again, without seeing pictures, if your frame has been compromised, e.g. "eaten by the chain" you might need a new frame, which means it would be cheaper to just get a new bike.

clean it up as best as you can, then take it into a shop and get it "tuned." after two years you are going to need new cables no matter what. you also probably need new brake pads. depending on how bad the chain is, you might need a new chain, and if your chain is *really* hosed up and you rode it, you may need to get a new cassette along with the chain.

it's tough to say without seeing the bike and knowing the state, other than a "gunky" chain. good luck.