Need some help with my Sony Ericsson

view story

http://androidforums.com – OK, So I have bought this phone of my friend and his gmail account is still on the phone and wanna put it in my gmail, but it says I can't delete the account unless I reset the phone... I also have problems with the phone wanting to type on it's own sometimes? it types random letters when Im typing a message and I turn it on and off and it goes away... what could I do to fix it? and I also have "Memory" problem this phone has like five game's that I absoulutley never play and I can't delete them at all .. any suggestions because they take up too much space...? Another question is i (General)