There's not enough power to make the needle move up n down fast enough?

If it's an older mechanical machine, it may be seizing due to old oil that has dried and preventing the parts from moving efficiently. If this is the case, refrain from further use until it has been addressed or the motor could be damaged.

Wheel on right side that controls the needle up and down is very tight...

Some machines have a dual speed setting. Check that your machine has not been set to half speed. Older mechanical machines may have a speed control on the foot control. Look on the underside for a "+" & "-" that will regulate the speed.

Your machine is an older mechanical. It needs cleaning and oiling to keep it going. It is probably seizing because the old oil has dried. Continued use could damage the motor.

Wheel on right side that controls the needle up and down is very tight...

it could be a part is damaged or broken or a timing problem,,it
would be a good idea to have the machine checked.

try changing the needle
rethread the machine top & bobbin
it is also possible that the machine could be out of time & needs to be
checked at a repair shop

if there is a thread in the hook area try taking a pair of needle nose
pliers to try & get the thread out, if that doesn't work then you might
think about taking the machine to a sewing machine shop to have the
machine checked since the needle will not go up & down & handwheel
won't move

if the needle bar doesn't move the needle up & down then the machine needs to be serviced, to find out why it isn't moving

are you saying the needle bar that moves the needle isn't going up & down?
when was the last time it was serviced?

Obvious things first:

is the pressure foot lowered to hold the fabric down?
Are the feed dogs clean and not blocked up with lint?
What stitch length have you set the machine to (if this is what you mean by "5" then that's not it obviously)
Is the machine in a buttonholing sequence or something similar?
Are the feed dogs moving at all in the stitching sequence? Raise the pressure foot and without fabric or thread manually turn the flywheel towards you and watch them moving. Are they coming up above the surface of the needle plate during their sequence.

If they are not moving at all, good chance a gear in the lower shaft has failed.
If they are moving but not coming up above the needle plate enough to move the fabric backwards, then they need adjusting to the correct level.

check to make sure the needle is inserted correctly--flat side to the back of the machine
that the needle is inserted all the way up in the needle shaft

check the needle clamp screw to make sure it's not loose

is the needle correct for the fabric that's being sewn

check to make sure the needle is not hitting the needle plate- if it's hitting the needle plate or the bobbin case then it's possible the machine is out of time & would have to be serviced because they have the proper tools to time it

I'm assuming that your talking about the needle bar (where you put the needle in) that doesn't go up high enough. The needle bar has a screw that secures it in place, and if you loosen it you will be able to slide up the needle bar high enough to be able to put your needle in. Now this bar does have a set height that it's suppose to be, so you'll have to set the timing of the needle bar when you loosen the screw. Loosen the screw, move the needle bar up enough to so you can put a needle in. Set it on wide zig zag. When the needle is on the up stroke the hook tip should pass behind the needle just above the eye of the needle. The hook is the piece the the bobbin case mounts on. If the hook tip faces to the right you have to time it with the needle on the right swing of the widest zig zag. If the hook faces to the left, just the opposite.

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