The letter E means a 1948 date of manufacture. The 1936 is probably the rest of the serial number with the whole serial number being E1936.
Made between 1936 and 1945
Yes
Marlin
there is a marlin collectors site or gunbroker.com
1990
Not enough information given to answer this question.
1984
30
By including the serial number in your question,we will be able to answer when your Marlin model 336 was produced.
the cost 3030 cal 336sc
This would be best left to a qualified gunsmith to do.
Model variation