I have trouble taping when i put the timer on it does't tape.

It sounds like the remote you have, the JVC 076D0FB010, does not have the capability to program future recordings on your JVC HR-XVC1U or HR-XVC27U machines. This feature is typically called "timer recording" or "scheduled recording," and it is controlled by the VCR's built-in programming features, rather than by the remote.
You may want to check the user manual for your JVC HR-XVC1U and HR-XVC27U machines to see if there is a way to set timer recordings using the VCR's own controls. If the manual does not provide instructions for timer recording, it is likely that this feature is not available on your VCRs.
Alternatively, you can consider purchasing a universal remote that has the ability to program future recordings. Some popular universal remotes include the Logitech Harmony and the Philips Universal Remote Control.

try to see it in the sides or it might be in the bottom of the machine in some models remove the older and replace the newer.

I am not an expert on these things.

Could be a problem with the machine; I think there is an optical device that detects the presence of a tape and I hear these sometimes give trouble.

Possibly there is a foreign object inside that is preventing the cassette transport from settling fully into the position where the machine will work.
The cover is usually fairly simple to remove in order to check.

Manual in PDF of 44 pages is here for free:

http://www.hammerwall.com/Download_Manual/70246/

If you have the VHS tape it can be converted to DVD, I do them as well but you might find someone near you that offers video conversion, or tape to disk or VHS to DVD. Contact me if you have the VHS tape and need it converted cheaply.

Thank you.  The machine has a reset button that brings the counter back to zero. Still not sure it is working right but I'll see as I transcribe my tapes.

Simple. The Cassette's 'Prevent Erasure' tab is missing. Just cover with Scotch tape and reload. Now try recording.

The sensor that detects the tape movement is bad and will need to be replaced.

Try this :
If your VCR malfunctions, try the following steps prior to contacting your Mitsubishi Dealer:
1 Check the Trouble Checks below to see if there is a solution to the current problem that you are
experiencing.
2 If the problem is not addressed on the Trouble Checks, the safety circuits in the VCR may be in
operation, thus please try the following: (the clock setting and the timer recording will be deleted.)
1 If possible, press EJECT on the front panel and remove the tape.
2 Press TIMER RESET on the rear panel with a pencil or a ball point pen.
3 If a tape is not loaded, press POWER to turn the power on. If a tape is loaded, wait about 1 minute
until the tape protecting function is completed, then press POWER.
3 You may also try the following procedure if the above steps did not resolve the problem (All settings will
be reset to the default settings.).
1 Press POWER on the front panel continuously for about 8 seconds until the current time display on
the front panel shows "- : - -."
2 If a tape is not loaded, press POWER to turn the power on. If a tape is loaded, the tape protecting
function will work and "99" will appear on the front panel display to begin count down. Wait about 1
minute until it reaches "00" to show the tape protecting function is completed, then press POWER.
If the problem with your VCR persists, contact your Mitsubishi dealer for assistance.

Im looking for error codes.

I work at the History Channel and have  a VHS that had the same troubles. I need it desperately for the show I am working on. I tapped it on a table fast forwarded it and presto! Tape fixed, crisis averted. Thank you, Thank you, thank you.

you might have an object stuck inside or the belts need to be changed. also the idler could cause this problem. hope this helps.
good luck.