Hi Bitla
Welcome to Retouch Pro
You have done a good job on the ink marks.
For the colour patches the easiest way is to desaturate and recolour.
Image > Adjust > Desaturate
Then add a Hue/Sat layer. Click the colourize box and then play with the sliders to get the sepia tone (try hue 50 and sat 20)
Does this help?
If you need more help please post a larger image. You can post images up to 100kb
Ken.