Dental problems, what sort of treatments am I looking at?

[Imrak]

As you can see, my gums have receded, there's a grey-ish substance where the gums used to be, on the right front tooth there's brown substance that's limited to that area has yet to spread the entire tooth and on the tooth to the left there's a small dot that can't be brushed away.

In the back, the two teeth on the left aren't looking too good and the one tooth on the right broke ages ago but I never took care of it.

I'm guessing I need some aggressive treatment, including extraction of the damaged tooth on the right, but are the two teeth on the left and front tooth salvageable?

I hope this is the right place to ask, thanks.