Bunch of Newbie owner questions, what's safe to put floor jack on? Options

[Doug73/2.0]

Ok...so the projects begins. A bunch of Newbie questions.
1) Whats is a safe spot to jack the rear and to jack the front? The previous owner put the floor Jack right under the motor? is this safe. Once up, what is the best spot to put the jack stands. I've never owned a car without a frame..The floor under the drivers seat is toast, otherwise everything looks solid or already replaced Thanks

2) Car has been parked ten years, so I'm going to lift the tank out tonight. Question, is there a drain? The filler pipe neck is a giant rust blob..otherwise the tank looks fine...should this scare me (IMG:style_emoticons/default/blink.gif) ? Once out what should I do with the tank? Friends say just put some new gas swiss it around and re drain? I was woundering, do garges "flush" a tank like they do a radiator?

3) as long as I've got the tank out, should I replace the fuel lines? they look ok but I'm surprised to see plastic lines back by the engine?. Do you need flexible lines or can I just bend the new tubing to the desired shape. I.e are they using the plastic stuff to allow movement? With the tunnel covered, do you just slide the new lines thru and leave the old ones in place?

I pulled the plugs, squirted some oil in and manually pushed the car so at least I know the motor turns over, I just don't want the crap in the tank to get sucked into the injectors. If I leave the fuel lines in place for now, can I use compressed air to blow the old fuel out of the?
Thanks for the advice (IMG:style_emoticons/default/cool.gif) Doug