I lost my manual and am trying to set up my rca

Since you neglected to specify the model of your RCA ViSYS 2-line system I can only suggest you select it from here to download a copy of the manual.

i lost my password on my android tablet

Possible. Check out your manual regarding speaker phone settings, etc.

Go into the phone menu, it is there.

Since you declined to specify the model of your RCA ViSYS 2-line phone, I can only suggest that you select it from this page to download a copy of the manual.

RCA ViSYS 2-Line Phone (25255RE2)

Here's the manual for your 2-line phone:
http://www.rca4business.com/products/pc/pdf/instruction-book/25255RE2.pdf

refer to pages 40-43 of your manual for "Answering System Operation."

To enable your Answering System, press and hold the "ans sys" button for 2 seconds.
The "ans sys" button indicator will flash.

To disable your Answering System, press and hold the same button for 2 seconds.
The "ans sys" button indicator will go off.

RCA makes several different 2-line phone systems. Select the model you have from
http://www.rca4business.com/products/pc/viewCategories.asp?idCategory=28

Follow this link for answers and troubleshooting tips. http://www.rca4business.com/products/pc/viewPrd.asp?idcategory=12&idproduct=14

Press store
dial in the phone number
press store
useing the keypad, set the name
press store
select the quick dial buttons to store the number
press store...

That's it!

need to set up message system