I want to know how to connect my Samsung galaxy tab4 to my LC195EM9

it is probably an app causing it.get rid all apps not needed and see haw it plays then

General rule, if you cannot update the Android version you cannot upgrade google play either.

To help you connect to the internet via WiFi from your Samsung Galaxy Tab, follow the steps given below:
- First activate the Wi-Fi connectivity: on the Home screen, press the 'Menu' option and then click on 'Settings'.
- Now click on 'Wireless & Networking' and then 'Wi-Fi Settings'.
- Click 'Enable Wi-Fi'.
- The check mark will turn green and your device shall automatically search for available network.

GuruAid.com

it means you are not connected to the internet via a cell data plan or wifi.

Yes. You have to buy a new SIM card from straight talk.

There is a option to open the phone lock using your Email Id that u hav registered with the phone.

http://downloadcenter.samsung.com/content/UM/201405/20140501024511768/GEN_SM-T530NU_Galaxy_Tab_4_KK_English_User_Manual_NC4_F4.pdf

The English version of the user manual.

To delete a wifi network from an Android device first open wifi settings and the list of networks.

Touch and hold the network you wish to remove.
An option will pop up to "forget network" this will delete it from memory and it will no longer connect to this network.

Here you go Carolyn! http://downloadcenter.samsung.com/content/UM/201405/20140509160405390/SM-T535_UM_EU_Kitkat_Eng_Rev.1.0_140508a.pdf

You don't get a manual nor can you buy one. You have to download it online. Google Samsung Galaxy Tab 4 or use this link.
http://mysamsungphones.com/samsung-galaxy-tab-4-10-1sm-t535-user-manual-guide/...Good Luck...xo