Heavy fuel consumption, left side exhaust red hot, speed drops and engine stalls

Good evening sir, please I just bought this Infiniti fx 35 SUV and I entered pathfinder in your column because there is no better arrangement for Infiniti otherwise, I won't have been able to complete my post to you.

In fact I started noticing this problems below:

(1) A crank sound in the engine whenever I start it first thing in the morning. Although, it goes off the moment the engine starts running. But resurfaces when accelerated in rest position.

(2) The wires to the battery terminals are always very hot whenever the vehicle is running;most especially, the positive one.

(3)The headlights comes on whenever I turn on the ignition. And also when the SUV ignition is turned off with the battery wires still tightened to the battery terminals, the headlamps will just turn up thereby draining the batteries when no one is around to notice and remove or unfasten one battery terminal.

(4) The white small inner fuse box has two face melted, I then bought another one but the SUV refused to start when cranked so we decided to return the old one and it started. What could be done by this?

(5) The wind screen wiper is not functioning when being controlled from the control switch stick.

(6) the A/C, inner blower/heater is not working.
(&) the seat controls are not working.

(7) When the engine is cranked and running smoothly, it will start misbehaving by not having much compression again and even when you throttle it, the working system will be scattering like scuttling. The movement will drop, the changing of gear becomes difficult by indicating a light on the instrument cluster as ''at'' even the automatic transmission oil does not flow nor return while in motion. What could be responsible for this?

(8) The two front shaft had been removed before I bought it but I have now bought them back to be fixed back in its position. Why could they have removed them?

(9) The exhaust, where it is joined to the one coming from the engine at the left side beneath the driver's foot rest becomes very hot and reddish when driving, even worse when in hold ups ( I mean unhealthy traffic gridlock ) thereby making the engine to stall, movement becomes sluggish. The exhaust has been removed and checked and no blockade found in either of them; then refixed.

(10) When the engine is running on idle position, if you throttle and leave it to run, it will go off immediately except you restart it again.

(11) When I decided to diagnose it, this was what I got: Codes Po-001, po-002, po-003, po-004, po-005, p-1610, and p- 1611 respectively.

I'll be very happy to hear from your wealth of experience soonest.

Thanks.

Also, sorry, I forgot to tell you that question number 4. Whenever the small inner white fuse fails to function, then, no current or sparks are produced from the coils for the SUV to start when cranked. And before I forget, numbers 3 and 4 of the plugs doesn't work even after changing the two coils and plugs. Please what could be responsible for the above as well.