#1: SETLCD 1,1, STR$(TIMERPV[1])
#2: Are you using a MD-HMI or are you using just the LCD and with a few input buttons? There are sample HMI program to let you enter a value and then just store that value into the timer/counter PV or SV.
If you only have LCD, there is an example "SetTimCtrSV.PC5 in your "samples" folder that does exactly what you want to do.