Yes you can.
Yes, done it many times.
Yes alcohol in checked luggage is permisible.
Electric shavers can be taken in both carry-on and checked luggage on airplanes. However, if you are carrying a disposable razor or a safety razor, they should be placed in your checked luggage to comply with airline regulations.
Highly unlikely - since medicines are rarely dispensed under pressure. Any medication should be in your hand luggage - not checked luggage, as you may be asked to produce it at any time by airport staff.
Probably, as long as it's inside checked luggage and not a carry-on bag.
No, Lufthansa has complimentary drinks and alcohol for all passengers and all classes.
Yes provided it is "drinking" alcohol and not 200 proof chemical alcohol.
If its in your checked luggage, not your carry ons.
All liquids taken onboard in hand luggage, including alcohol, have a 100ml (3.4 oz) restriction. No limits on checked, hold luggage. See related link below.
Yes, checked luggage is X-rayed and may be subject to further screening.
when traveling on airplanes carry on luggage with liquid bottles need to be 3 ounces or less therefore, You can't have three ounces of liquid in a six ounce bottle. Liquid can be transferred into travel size bottles found at places like wal-mart or rite aid. For checked luggage, I'm not sure.
Yes, wine maybe carried in checked luggage.
Yes, you can pack knives in your checked luggage.