Co2oo is my machines - Minolta EP4000/5000 CS/PRO Copier

It is titled "embroidery" machine.

Amazon com Brother PE770 5x7 inch Embroidery machine with built in memory...

Brother International Home Sewing Machine and Embroidery Machine PE770

From the description of the machine and the accessories, this is a dedicated embroidery machine.

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Growmax Machinery is a company specializing in food machinery. They are the leading manufacturer and supplier of Food production machines and manufacture of food machinery such as Namkeen Frying Machine, Pouch Packaging Machine, Kurkure Extruder, Snack Food Extruder, Snacks Frying Machine, Automatic Packaging Machines, Potato Chips Making Machines etc.

AK Techno service is the best service center for repairing and service for all types and brands of washing machines.
For more visit our website. http://aktechnoservice.com/samsung-washing-machine-service-center-in-hyderabad

Depends on your machine. Consult the owner's manual. Not all machines have this capability but many do.

http://www.sewdaily.com/how-to-sew/sewing-machine-basics/the-best-kept-secret-on-your-sewing-machine

http://makeitsew.biz/presser-foot-pressure

Sewing Machine Pressure Settings for Machine Quilting

Perfect Machine Tension Every Time Threads

Parts of Sewing Machine Pressure Adjustment

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Yes it is a rotary machine. The foot you bought may not be the correct one for your machine. Mostly all machines are now horizontal rotary hook machines, but they don't necessarily fit ALL of those machines, it may be for a certain brand of machine.

Best bet is to bring your machine when you buy a foot so you can try it out.

Take your machine in for service.

If this machine is still under warranty, make sure you take it to a dealer who is authorized to work on the brand of machine you have.

If this is a used machine - take it to anyone who fixes sewing machine as any warranty the machine had expired when it was resold.

You will be charged around $50 for the repair person to just look at the machine.

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Machine error 76 is a bad fuser lamp. Machine error 78 is a bad thermistor. Machine error 77 means you hade either a Machine error 76 or Machine error 78 and turned the machine off.
Sometimes the machines will give a false code and can be reset. Unplug machine. Hold down the Menu key while powering back up. You should still get a Machine error message. Enter the number 9...The display should change to Maintenance 9 then enter 1. The Machine error will return. Enter 99 and then make a test print. If you get either a machine error 76 or 78 you will need to have service done on your machine to have either the lamp or thermistor replaced, and depending on the usage of the machine, it might not be a bad idea to replace the entire fuser.